diff --git a/README.md b/README.md
index 8b35613c..117ac27d 100644
--- a/README.md
+++ b/README.md
@@ -165,7 +165,7 @@ Slackdump uses a simple [rusq/dlog][dlog] as a default logger (it is a wrapper a
 the standard logger that adds `Debug*` functions).
 
 If you want to use the same default logger that Slackdump uses in your
-application, it is available as `logger.Default`.
+application, it is available as `slog.Default()`.
 
 No doubts that everyone has their own favourite logger that is better than other
 miserable loggers.  Please read below for instructions on plugging your
diff --git a/auth/browser/client.go b/auth/browser/client.go
index 0a8a976f..99a88b3e 100644
--- a/auth/browser/client.go
+++ b/auth/browser/client.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log/slog"
 	"net/http"
 	"os"
 	"runtime"
@@ -13,7 +14,6 @@ import (
 
 	"github.com/playwright-community/playwright-go"
 	"github.com/rusq/slackdump/v3/auth/browser/pwcompat"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 const (
@@ -30,7 +30,7 @@ type Client struct {
 	verbose      bool
 }
 
-var Logger logger.Interface = logger.Default
+var Logger = slog.Default()
 
 var (
 	installFn = playwright.Install
@@ -51,7 +51,7 @@ func New(workspace string, opts ...Option) (*Client, error) {
 	for _, opt := range opts {
 		opt(cl)
 	}
-	l().Debugf("browser=%s, timeout=%f", cl.br, cl.loginTimeout)
+	slog.Debug("New", "workspace", cl.workspace, "browser", cl.br, "timeout", cl.loginTimeout)
 	runopts := &playwright.RunOptions{
 		Browsers: []string{cl.br.String()},
 		Verbose:  cl.verbose,
@@ -77,13 +77,14 @@ func (cl *Client) Authenticate(ctx context.Context) (string, []*http.Cookie, err
 		_b = playwright.Bool
 	)
 
+	lg := slog.Default()
 	pw, err := playwright.Run()
 	if err != nil {
 		return "", nil, err
 	}
 	defer func() {
 		if err := pw.Stop(); err != nil {
-			l().Printf("failed to stop playwright: %v", err)
+			lg.ErrorContext(ctx, "failed to stop playwright", "error", err)
 		}
 	}()
 
@@ -124,7 +125,7 @@ func (cl *Client) Authenticate(ctx context.Context) (string, []*http.Cookie, err
 	page.On("close", func() { trace.Log(ctx, "user", "page closed"); close(cl.pageClosed) })
 
 	uri := fmt.Sprintf("https://%s"+slackDomain, cl.workspace)
-	l().Debugf("opening browser URL=%s", uri)
+	lg.Debug("opening browser", "URL", uri)
 
 	if _, err := page.Goto(uri); err != nil {
 		return "", nil, err
@@ -219,13 +220,6 @@ func float2time(v float64) time.Time {
 	return time.Unix(int64(v), 0)
 }
 
-func l() logger.Interface {
-	if Logger == nil {
-		return logger.Default
-	}
-	return Logger
-}
-
 // pwRepair attempts to repair the playwright installation.
 func pwRepair(runopts *playwright.RunOptions) error {
 	ad, err := pwcompat.NewAdapter(runopts)
@@ -249,18 +243,21 @@ func Reinstall(browser Browser, verbose bool) error {
 }
 
 func reinstall(runopts *playwright.RunOptions) error {
-	l().Debugf("reinstalling browser: %s", runopts.Browsers[0])
+	lg := slog.With("browser", runopts.Browsers[0])
+
+	lg.Debug("reinstalling browser")
 	ad, err := pwcompat.NewAdapter(runopts)
 	if err != nil {
 		return err
 	}
-	l().Debugf("removing %s", ad.DriverDirectory)
+	lg = lg.With("driver_directory", ad.DriverDirectory)
+	lg.Debug("removing driver directory")
 	if err := os.RemoveAll(ad.DriverDirectory); err != nil {
 		return err
 	}
 
 	// attempt to reinstall
-	l().Debugf("reinstalling %s", ad.DriverDirectory)
+	lg.Debug("reinstalling")
 	if err := installFn(runopts); err != nil {
 		// we did everything we could, but it still failed.
 		return err
diff --git a/auth/rod.go b/auth/rod.go
index a49d240c..8c1137fd 100644
--- a/auth/rod.go
+++ b/auth/rod.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"log/slog"
 	"os"
 	"time"
 
@@ -12,7 +13,6 @@ import (
 
 	"github.com/rusq/slackdump/v3/auth/auth_ui"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 // RODHeadlessTimeout is the default timeout for the headless login flow.
@@ -116,12 +116,12 @@ func NewRODAuth(ctx context.Context, opts ...Option) (RodAuth, error) {
 	}
 	defer cl.Close()
 
-	lg := logger.FromContext(ctx)
+	lg := slog.Default()
 	t := time.Now()
 	var sp simpleProvider
 	switch resp.Type {
 	case auth_ui.LInteractive, auth_ui.LUserBrowser:
-		lg.Printf("ℹ️ Initialising browser, once the browser appears, login as usual")
+		lg.InfoContext(ctx, "ℹ️ Initialising browser, once the browser appears, login as usual")
 		var err error
 		sp.Token, sp.Cookie, err = cl.Manual(ctx)
 		if err != nil {
@@ -135,7 +135,7 @@ func NewRODAuth(ctx context.Context, opts ...Option) (RodAuth, error) {
 	case auth_ui.LCancel:
 		return r, ErrCancelled
 	}
-	lg.Printf("✅ authenticated (time taken: %s)", time.Since(t))
+	lg.InfoContext(ctx, "✅ authenticated", "time_taken", time.Since(t).String())
 
 	return RodAuth{
 		simpleProvider: sp,
diff --git a/channels.go b/channels.go
index 8ba3ec6b..e7d01bcc 100644
--- a/channels.go
+++ b/channels.go
@@ -79,14 +79,13 @@ func (s *Session) getChannels(ctx context.Context, chanTypes []string, cb func(t
 		}
 		total += len(chans)
 
-		s.log.Printf("channels request #%5d, fetched: %4d, total: %8d (speed: %6.2f/sec, avg: %6.2f/sec)\n",
-			i, len(chans), total,
-			float64(len(chans))/float64(time.Since(reqStart).Seconds()),
-			float64(total)/float64(time.Since(fetchStart).Seconds()),
+		s.log.InfoContext(ctx, "channels", "request", i, "fetched", len(chans), "total", total,
+			"speed", float64(len(chans))/time.Since(reqStart).Seconds(),
+			"avg", float64(total)/time.Since(fetchStart).Seconds(),
 		)
 
 		if nextcur == "" {
-			s.log.Printf("channels fetch complete, total: %d channels", total)
+			s.log.InfoContext(ctx, "channels fetch complete", "total", total)
 			break
 		}
 
diff --git a/channels_test.go b/channels_test.go
index 00311ba0..4e092845 100644
--- a/channels_test.go
+++ b/channels_test.go
@@ -3,6 +3,7 @@ package slackdump
 import (
 	"context"
 	"errors"
+	"log/slog"
 	"reflect"
 	"testing"
 
@@ -11,7 +12,6 @@ import (
 	"go.uber.org/mock/gomock"
 
 	"github.com/rusq/slackdump/v3/internal/network"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 )
 
@@ -80,7 +80,7 @@ func TestSession_getChannels(t *testing.T) {
 			sd := &Session{
 				client: mc,
 				cfg:    tt.fields.config,
-				log:    logger.Silent,
+				log:    slog.Default(),
 			}
 
 			if tt.expectFn != nil {
diff --git a/cmd/slackdump/internal/archive/archive.go b/cmd/slackdump/internal/archive/archive.go
index e65d572d..0dcdad91 100644
--- a/cmd/slackdump/internal/archive/archive.go
+++ b/cmd/slackdump/internal/archive/archive.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	_ "embed"
 	"errors"
+	"log/slog"
 	"time"
 
 	"github.com/rusq/fsadapter"
@@ -14,7 +15,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/chunk/control"
 	"github.com/rusq/slackdump/v3/internal/chunk/transform/fileproc"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/stream"
 )
 
@@ -63,7 +63,7 @@ func RunArchive(ctx context.Context, cmd *base.Command, args []string) error {
 		base.SetExitStatus(base.SInitializationError)
 		return err
 	}
-	lg := logger.FromContext(ctx)
+	lg := cfg.Log
 	stream := sess.Stream(
 		stream.OptLatest(time.Time(cfg.Latest)),
 		stream.OptOldest(time.Time(cfg.Oldest)),
@@ -84,14 +84,14 @@ func RunArchive(ctx context.Context, cmd *base.Command, args []string) error {
 		base.SetExitStatus(base.SApplicationError)
 		return err
 	}
-	lg.Printf("Recorded workspace data to %s", cd.Name())
+	lg.Info("Recorded workspace data", "filename", cd.Name())
 
 	return nil
 }
 
-func resultLogger(lg logger.Interface) func(sr stream.Result) error {
+func resultLogger(lg *slog.Logger) func(sr stream.Result) error {
 	return func(sr stream.Result) error {
-		lg.Printf("%s", sr)
+		lg.Info("stream", "result", sr.String())
 		return nil
 	}
 }
diff --git a/cmd/slackdump/internal/archive/search.go b/cmd/slackdump/internal/archive/search.go
index da7247e7..9dd22068 100644
--- a/cmd/slackdump/internal/archive/search.go
+++ b/cmd/slackdump/internal/archive/search.go
@@ -3,6 +3,7 @@ package archive
 import (
 	"context"
 	"errors"
+	"log/slog"
 	"strings"
 
 	"github.com/rusq/fsadapter"
@@ -12,7 +13,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/chunk"
 	"github.com/rusq/slackdump/v3/internal/chunk/control"
 	"github.com/rusq/slackdump/v3/internal/chunk/transform/fileproc"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/stream"
 )
 
@@ -134,7 +134,7 @@ func initController(ctx context.Context, args []string) (*control.Controller, fu
 	}
 	defer cd.Close()
 
-	lg := logger.FromContext(ctx)
+	lg := slog.Default()
 	dl, stop := fileproc.NewDownloader(
 		ctx,
 		cfg.DownloadFiles,
diff --git a/cmd/slackdump/internal/cfg/cfg.go b/cmd/slackdump/internal/cfg/cfg.go
index 8abb5913..fe8a5555 100644
--- a/cmd/slackdump/internal/cfg/cfg.go
+++ b/cmd/slackdump/internal/cfg/cfg.go
@@ -4,6 +4,7 @@ package cfg
 import (
 	"flag"
 	"fmt"
+	"log/slog"
 	"os"
 	"time"
 
@@ -12,7 +13,6 @@ import (
 	"github.com/rusq/slackdump/v3/auth"
 	"github.com/rusq/slackdump/v3/auth/browser"
 	"github.com/rusq/slackdump/v3/internal/network"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 const (
@@ -55,8 +55,7 @@ var (
 	UserCacheRetention time.Duration
 	NoUserCache        bool
 
-	Log logger.Interface
-
+	Log *slog.Logger = slog.Default()
 	// LoadSecrets is a flag that indicates whether to load secrets from the
 	// environment variables.
 	LoadSecrets bool
diff --git a/cmd/slackdump/internal/convertcmd/convert.go b/cmd/slackdump/internal/convertcmd/convert.go
index 90874a19..12d782fd 100644
--- a/cmd/slackdump/internal/convertcmd/convert.go
+++ b/cmd/slackdump/internal/convertcmd/convert.go
@@ -11,7 +11,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/chunk"
 	"github.com/rusq/slackdump/v3/internal/chunk/transform/fileproc"
 	"github.com/rusq/slackdump/v3/internal/convert"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 var CmdConvert = &base.Command{
@@ -60,8 +59,8 @@ func runConvert(ctx context.Context, cmd *base.Command, args []string) error {
 		return errors.New("unsupported conversion type")
 	}
 
-	lg := logger.FromContext(ctx)
-	lg.Printf("converting (%s) %q to (%s) %q", params.inputfmt, args[0], params.outputfmt, cfg.Output)
+	lg := cfg.Log
+	lg.InfoContext(ctx, "converting", "input_format", params.inputfmt, "source", args[0], "output_format", params.outputfmt, "output", cfg.Output)
 
 	cflg := convertflags{
 		withFiles: cfg.DownloadFiles,
@@ -73,7 +72,7 @@ func runConvert(ctx context.Context, cmd *base.Command, args []string) error {
 		return err
 	}
 
-	lg.Printf("completed in %s", time.Since(start))
+	lg.InfoContext(ctx, "completed", "took", time.Since(start))
 	return nil
 }
 
@@ -123,7 +122,7 @@ func chunk2export(ctx context.Context, src, trg string, cflg convertflags) error
 		fsa,
 		convert.WithIncludeFiles(cflg.withFiles),
 		convert.WithTrgFileLoc(sttFn),
-		convert.WithLogger(logger.FromContext(ctx)),
+		convert.WithLogger(cfg.Log),
 	)
 	if err := cvt.Convert(ctx); err != nil {
 		return err
diff --git a/cmd/slackdump/internal/diag/edge.go b/cmd/slackdump/internal/diag/edge.go
index c538138a..3c4c13bd 100644
--- a/cmd/slackdump/internal/diag/edge.go
+++ b/cmd/slackdump/internal/diag/edge.go
@@ -6,9 +6,9 @@ import (
 	"os"
 
 	"github.com/rusq/slackdump/v3/auth"
+	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/cfg"
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/golang/base"
 	"github.com/rusq/slackdump/v3/internal/edge"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 var CmdEdge = &base.Command{
@@ -33,7 +33,7 @@ func init() {
 }
 
 func runEdge(ctx context.Context, cmd *base.Command, args []string) error {
-	lg := logger.FromContext(ctx)
+	lg := cfg.Log
 
 	prov, err := auth.FromContext(ctx)
 	if err != nil {
@@ -47,9 +47,9 @@ func runEdge(ctx context.Context, cmd *base.Command, args []string) error {
 		return err
 	}
 	defer cl.Close()
-	lg.Print("connected")
+	lg.Info("connected")
 
-	lg.Printf("*** Search for Channels test ***")
+	lg.Info("*** Search for Channels test ***")
 	channels, err := cl.SearchChannels(ctx, "")
 	if err != nil {
 		return err
@@ -115,7 +115,7 @@ func runEdge(ctx context.Context, cmd *base.Command, args []string) error {
 	// 	}
 	// }
 
-	lg.Print("OK")
+	lg.Info("OK")
 	return nil
 }
 
diff --git a/cmd/slackdump/internal/diag/eztest.go b/cmd/slackdump/internal/diag/eztest.go
index 02d1567e..6ea68c83 100644
--- a/cmd/slackdump/internal/diag/eztest.go
+++ b/cmd/slackdump/internal/diag/eztest.go
@@ -11,8 +11,8 @@ import (
 	"github.com/playwright-community/playwright-go"
 
 	"github.com/rusq/slackdump/v3/auth"
+	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/cfg"
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/golang/base"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 var CmdEzTest = &base.Command{
@@ -65,7 +65,7 @@ func init() {
 }
 
 func runEzLoginTest(ctx context.Context, cmd *base.Command, args []string) error {
-	lg := logger.FromContext(ctx)
+	lg := cfg.Log
 
 	if err := cmd.Flag.Parse(args); err != nil {
 		base.SetExitStatus(base.SInvalidParameters)
@@ -95,9 +95,9 @@ func runEzLoginTest(ctx context.Context, cmd *base.Command, args []string) error
 		return err
 	}
 	if res.Err == nil {
-		lg.Println("OK")
+		lg.Info("OK")
 	} else {
-		lg.Println("ERROR")
+		lg.Error("ERROR", "error", *res.Err)
 		base.SetExitStatus(base.SApplicationError)
 		return errors.New(*res.Err)
 	}
diff --git a/cmd/slackdump/internal/diag/record.go b/cmd/slackdump/internal/diag/record.go
index 58bcc49f..af5d05d1 100644
--- a/cmd/slackdump/internal/diag/record.go
+++ b/cmd/slackdump/internal/diag/record.go
@@ -78,7 +78,8 @@ func runRecord(ctx context.Context, _ *base.Command, args []string) error {
 
 	rec := chunk.NewRecorder(w)
 	for _, ch := range args {
-		cfg.Log.Printf("streaming channel %q", ch)
+		lg := cfg.Log.With("channel_id", ch)
+		lg.InfoContext(ctx, "streaming")
 		if err := sess.Stream().SyncConversations(ctx, rec, ch); err != nil {
 			if err2 := rec.Close(); err2 != nil {
 				base.SetExitStatus(base.SApplicationError)
diff --git a/cmd/slackdump/internal/diag/search.go b/cmd/slackdump/internal/diag/search.go
index d5318fc8..d7db564b 100644
--- a/cmd/slackdump/internal/diag/search.go
+++ b/cmd/slackdump/internal/diag/search.go
@@ -16,7 +16,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/chunk"
 	"github.com/rusq/slackdump/v3/internal/chunk/dirproc"
 	"github.com/rusq/slackdump/v3/internal/network"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 	"golang.org/x/time/rate"
 )
@@ -78,7 +77,7 @@ func runSearch(ctx context.Context, cmd *base.Command, args []string) error {
 	query := args[0]
 
 	lim := rate.NewLimiter(rate.Every(3*time.Second), 5)
-	lg := logger.FromContext(ctx)
+	lg := cfg.Log
 	var p = slack.SearchParameters{
 		Sort:          "timestamp",
 		SortDirection: "desc",
@@ -101,10 +100,10 @@ func runSearch(ctx context.Context, cmd *base.Command, args []string) error {
 		enc.Encode(sm.Matches)
 
 		if sm.NextCursor == "" {
-			lg.Print("no more messages")
+			lg.Info("no more messages")
 			break
 		}
-		lg.Printf("cursor %s", sm.NextCursor)
+		lg.Info("paginating", "cursor", sm.NextCursor)
 		p.Cursor = sm.NextCursor
 
 		if err := lim.Wait(ctx); err != nil {
diff --git a/cmd/slackdump/internal/diag/uninstall.go b/cmd/slackdump/internal/diag/uninstall.go
index daf28d11..a711c92e 100644
--- a/cmd/slackdump/internal/diag/uninstall.go
+++ b/cmd/slackdump/internal/diag/uninstall.go
@@ -15,7 +15,6 @@ import (
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/ui/cfgui"
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/ui/dumpui"
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/ui/updaters"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 var CmdUninstall = &base.Command{
@@ -82,12 +81,12 @@ func removeFunc(dry bool) func(string) error {
 
 func uninstallPlaywright(ctx context.Context, si info.PwInfo, dry bool) error {
 	removeFn := removeFunc(dry)
-	lg := logger.FromContext(ctx)
-	lg.Printf("Deleting %s", si.Path)
+	lg := cfg.Log
+	lg.InfoContext(ctx, "Deleting", "path", si.Path)
 	if err := removeFn(si.Path); err != nil {
 		return fmt.Errorf("failed to remove the playwright library: %w", err)
 	}
-	lg.Printf("Deleting browsers in %s", si.BrowsersPath)
+	lg.InfoContext(ctx, "Deleting browsers", "browsers_path", si.BrowsersPath)
 
 	if err := removeFn(si.BrowsersPath); err != nil {
 		return fmt.Errorf("failed to remove the playwright browsers: %w", err)
@@ -96,7 +95,7 @@ func uninstallPlaywright(ctx context.Context, si info.PwInfo, dry bool) error {
 	if len(dir) == 0 {
 		return errors.New("unable to reliably determine playwright path")
 	}
-	lg.Printf("Deleting all playwright versions from:  %s", dir)
+	lg.InfoContext(ctx, "Deleting all playwright versions", "dir", dir)
 	if err := removeFn(dir); err != nil {
 		return fmt.Errorf("failed to remove the playwright versions: %w", err)
 	}
@@ -104,20 +103,20 @@ func uninstallPlaywright(ctx context.Context, si info.PwInfo, dry bool) error {
 	return nil
 }
 
-func uninstallRod(_ context.Context, si info.RodInfo, dry bool) error {
+func uninstallRod(ctx context.Context, si info.RodInfo, dry bool) error {
 	removeFn := removeFunc(dry)
 	if si.Path == "" {
 		return errors.New("unable to determine rod browser path")
 	}
 	lg := cfg.Log
-	lg.Printf("Deleting incognito Browser...")
+	lg.InfoContext(ctx, "Deleting incognito Browser...")
 	if !dry {
 		_ = slackauth.RemoveBrowser() // just to make sure.
 	} else {
-		lg.Printf("Would remove incognito browser")
+		lg.InfoContext(ctx, "Would remove incognito browser")
 	}
 
-	lg.Printf("Deleting %s...", si.Path)
+	lg.InfoContext(ctx, "Deleting...", "path", si.Path)
 	if err := removeFn(si.Path); err != nil {
 		return fmt.Errorf("failed to remove the rod browser: %w", err)
 	}
diff --git a/cmd/slackdump/internal/dump/dump.go b/cmd/slackdump/internal/dump/dump.go
index e030920f..3b0cc73c 100644
--- a/cmd/slackdump/internal/dump/dump.go
+++ b/cmd/slackdump/internal/dump/dump.go
@@ -25,7 +25,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/chunk/transform/fileproc"
 	"github.com/rusq/slackdump/v3/internal/nametmpl"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/stream"
 	"github.com/rusq/slackdump/v3/types"
 )
@@ -77,7 +76,7 @@ func RunDump(ctx context.Context, _ *base.Command, args []string) error {
 		return ErrNothingToDo
 	}
 
-	lg := logger.FromContext(ctx)
+	lg := cfg.Log
 
 	// initialize the list of entities to dump.
 	list, err := structures.NewEntityList(args)
@@ -106,7 +105,7 @@ func RunDump(ctx context.Context, _ *base.Command, args []string) error {
 	}
 	defer func() {
 		if err := fsa.Close(); err != nil {
-			lg.Printf("warning: failed to close the filesystem: %v", err)
+			lg.WarnContext(ctx, "warning: failed to close the filesystem", "error", err)
 		}
 	}()
 
@@ -136,7 +135,7 @@ func RunDump(ctx context.Context, _ *base.Command, args []string) error {
 		base.SetExitStatus(base.SApplicationError)
 		return err
 	}
-	lg.Printf("dumped %d conversations in %s", len(p.list.Include), time.Since(start))
+	lg.InfoContext(ctx, "conversation dump finished", "count", len(p.list.Include), "took", time.Since(start))
 	return nil
 }
 
@@ -181,8 +180,8 @@ func dump(ctx context.Context, sess *slackdump.Session, fsa fsadapter.FS, p dump
 		return fmt.Errorf("failed to create temp directory: %w", err)
 	}
 
-	lg := logger.FromContext(ctx)
-	lg.Debugf("using directory: %s", dir)
+	lg := cfg.Log
+	lg.Debug("using directory", "dir", dir)
 
 	// files subprocessor
 	var sdl fileproc.Downloader
@@ -226,7 +225,7 @@ func dump(ctx context.Context, sess *slackdump.Session, fsa fsadapter.FS, p dump
 	}
 	defer func() {
 		if err := proc.Close(); err != nil {
-			lg.Printf("failed to close conversation processor: %v", err)
+			lg.WarnContext(ctx, "failed to close conversation processor", "error", err)
 		}
 	}()
 
@@ -239,7 +238,7 @@ func dump(ctx context.Context, sess *slackdump.Session, fsa fsadapter.FS, p dump
 			}
 			if sr.IsLast {
 				//TODO:  this is unbeautiful.
-				lg.Printf("%s dumped", sr)
+				lg.InfoContext(ctx, "dumped", "sr", sr.String())
 			}
 			return nil
 		}),
@@ -247,7 +246,7 @@ func dump(ctx context.Context, sess *slackdump.Session, fsa fsadapter.FS, p dump
 		return fmt.Errorf("failed to dump conversations: %w", err)
 	}
 
-	lg.Debugln("stream complete, waiting for all goroutines to finish")
+	lg.DebugContext(ctx, "stream complete, waiting for all goroutines to finish")
 	if err := coord.Wait(); err != nil {
 		return err
 	}
diff --git a/cmd/slackdump/internal/emoji/emojidl/emoji.go b/cmd/slackdump/internal/emoji/emojidl/emoji.go
index e025fdbe..7b6bd55b 100644
--- a/cmd/slackdump/internal/emoji/emojidl/emoji.go
+++ b/cmd/slackdump/internal/emoji/emojidl/emoji.go
@@ -27,7 +27,7 @@ import (
 	"sync"
 
 	"github.com/rusq/fsadapter"
-	"github.com/rusq/slackdump/v3/logger"
+	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/cfg"
 )
 
 const (
@@ -63,7 +63,7 @@ func DlFS(ctx context.Context, sess emojidumper, fsa fsadapter.FS, failFast bool
 // fetch downloads the emojis and saves them to the fsa. It spawns numWorker
 // goroutines for getting the files. It will call fetchFn for each emoji.
 func fetch(ctx context.Context, fsa fsadapter.FS, emojis map[string]string, failFast bool) error {
-	lg := logger.FromContext(ctx)
+	lg := cfg.Log.With("in", "fetch", "dir", emojiDir, "numWorkers", numWorkers, "failFast", failFast)
 
 	var (
 		emojiC  = make(chan emoji)
@@ -105,6 +105,7 @@ func fetch(ctx context.Context, fsa fsadapter.FS, emojis map[string]string, fail
 		total = len(emojis)
 		count = 0
 	)
+	lg = lg.With("total", total)
 	for res := range resultC {
 		if res.err != nil {
 			if errors.Is(res.err, context.Canceled) {
@@ -113,10 +114,10 @@ func fetch(ctx context.Context, fsa fsadapter.FS, emojis map[string]string, fail
 			if failFast {
 				return fmt.Errorf("failed: %q: %w", res.name, res.err)
 			}
-			lg.Printf("failed: %q: %s", res.name, res.err)
+			lg.WarnContext(ctx, "failed", "name", res.name, "error", res.err)
 		}
 		count++
-		lg.Printf("downloaded % 5d/%d %q", count, total, res.name)
+		lg.InfoContext(ctx, "downloaded", "count", count, "name", res.name)
 	}
 
 	return nil
diff --git a/cmd/slackdump/internal/export/export.go b/cmd/slackdump/internal/export/export.go
index 250dd609..fd264bc3 100644
--- a/cmd/slackdump/internal/export/export.go
+++ b/cmd/slackdump/internal/export/export.go
@@ -7,7 +7,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/rusq/dlog"
 	"github.com/rusq/fsadapter"
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/bootstrap"
 
@@ -15,7 +14,6 @@ import (
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/golang/base"
 	"github.com/rusq/slackdump/v3/internal/chunk/transform/fileproc"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 var CmdExport = &base.Command{
@@ -84,8 +82,9 @@ func runExport(ctx context.Context, cmd *base.Command, args []string) error {
 		base.SetExitStatus(base.SUserError)
 		return err
 	}
+	lg := cfg.Log
 	defer func() {
-		dlog.Debugln("closing the fsadapter")
+		lg.DebugContext(ctx, "closing the fsadapter")
 		fsa.Close()
 	}()
 
@@ -99,7 +98,6 @@ func runExport(ctx context.Context, cmd *base.Command, args []string) error {
 		return fmt.Errorf("export failed: %w", err)
 	}
 
-	lg := logger.FromContext(ctx)
-	lg.Printf("export completed in %s", time.Since(start).Truncate(time.Second).String())
+	lg.InfoContext(ctx, "export completed", "took", time.Since(start).String())
 	return nil
 }
diff --git a/cmd/slackdump/internal/export/v2.go b/cmd/slackdump/internal/export/v2.go
index a427c764..9fc2a9d9 100644
--- a/cmd/slackdump/internal/export/v2.go
+++ b/cmd/slackdump/internal/export/v2.go
@@ -6,16 +6,16 @@ import (
 
 	"github.com/rusq/fsadapter"
 	"github.com/rusq/slackdump/v3"
+	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/cfg"
 	"github.com/rusq/slackdump/v3/export"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 func exportV2(ctx context.Context, sess *slackdump.Session, fs fsadapter.FS, list *structures.EntityList, flags exportFlags) error {
 	config := export.Config{
 		Oldest:      time.Time(flags.Oldest),
 		Latest:      time.Time(flags.Latest),
-		Logger:      logger.FromContext(ctx),
+		Logger:      cfg.Log,
 		List:        list,
 		Type:        export.ExportType(flags.ExportStorageType),
 		MemberOnly:  flags.MemberOnly,
diff --git a/cmd/slackdump/internal/export/v3.go b/cmd/slackdump/internal/export/v3.go
index 3078980c..0d086386 100644
--- a/cmd/slackdump/internal/export/v3.go
+++ b/cmd/slackdump/internal/export/v3.go
@@ -2,6 +2,7 @@ package export
 
 import (
 	"context"
+	"log/slog"
 	"os"
 
 	"github.com/rusq/fsadapter"
@@ -16,7 +17,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/chunk/transform"
 	"github.com/rusq/slackdump/v3/internal/chunk/transform/fileproc"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/stream"
 )
 
@@ -24,20 +24,20 @@ import (
 
 // exportV3 runs the export v3.
 func exportV3(ctx context.Context, sess *slackdump.Session, fsa fsadapter.FS, list *structures.EntityList, params exportFlags) error {
-	lg := logger.FromContext(ctx)
+	lg := cfg.Log
 
 	tmpdir, err := os.MkdirTemp("", "slackdump-*")
 	if err != nil {
 		return err
 	}
 
-	lg.Printf("using %s as the temporary directory", tmpdir)
+	lg.InfoContext(ctx, "temporary directory in use", "tmpdir", tmpdir)
 	chunkdir, err := chunk.OpenDir(tmpdir)
 	if err != nil {
 		return err
 	}
 	defer chunkdir.Close()
-	if !lg.IsDebug() {
+	if !lg.Enabled(ctx, slog.LevelDebug) {
 		defer func() { _ = chunkdir.RemoveAll() }()
 	}
 	updFn := func() func(_ *slack.Channel, m *slack.Message) error {
@@ -61,7 +61,7 @@ func exportV3(ctx context.Context, sess *slackdump.Session, fsa fsadapter.FS, li
 		-1,
 		progressbar.OptionClearOnFinish(),
 		progressbar.OptionSpinnerType(8)),
-		lg.IsDebug(),
+		lg.Enabled(ctx, slog.LevelDebug),
 	)
 	_ = pb.RenderBlank()
 
@@ -69,7 +69,7 @@ func exportV3(ctx context.Context, sess *slackdump.Session, fsa fsadapter.FS, li
 		stream.OptOldest(params.Oldest),
 		stream.OptLatest(params.Latest),
 		stream.OptResultFn(func(sr stream.Result) error {
-			lg.Debugf("conversations: %s", sr.String())
+			lg.DebugContext(ctx, "conversations", "sr", sr.String())
 			pb.Describe(sr.String())
 			_ = pb.Add(1)
 			return nil
@@ -88,7 +88,7 @@ func exportV3(ctx context.Context, sess *slackdump.Session, fsa fsadapter.FS, li
 		control.WithTransformer(tf),
 	)
 
-	lg.Print("running export...")
+	lg.InfoContext(ctx, "running export...")
 	if err := ctr.Run(ctx, list); err != nil {
 		_ = pb.Finish()
 		return err
@@ -104,8 +104,8 @@ func exportV3(ctx context.Context, sess *slackdump.Session, fsa fsadapter.FS, li
 	}
 	pb.Describe("OK")
 	lg.Debug("index written")
-	lg.Println("conversations export finished")
-	lg.Debugf("chunk files in: %s", tmpdir)
+	lg.InfoContext(ctx, "conversations export finished")
+	lg.DebugContext(ctx, "chunk files in: %s", tmpdir)
 	return nil
 }
 
diff --git a/cmd/slackdump/internal/export/v3_test.go b/cmd/slackdump/internal/export/v3_test.go
index c64adc17..7548e566 100644
--- a/cmd/slackdump/internal/export/v3_test.go
+++ b/cmd/slackdump/internal/export/v3_test.go
@@ -2,13 +2,10 @@ package export
 
 import (
 	"context"
-	"log"
 	"net/http"
-	"os"
 	"path/filepath"
 	"testing"
 
-	"github.com/rusq/dlog"
 	"github.com/rusq/fsadapter"
 	"github.com/rusq/slack"
 	"github.com/rusq/slackdump/v3"
@@ -17,7 +14,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/fixtures"
 	"github.com/rusq/slackdump/v3/internal/network"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 const (
@@ -67,12 +63,11 @@ func Test_exportV3(t *testing.T) {
 		defer srv.Close()
 		cl := slack.New("", slack.OptionAPIURL(srv.URL()))
 
-		lg := dlog.New(os.Stderr, "test ", log.LstdFlags, true)
-		ctx := logger.NewContext(context.Background(), lg)
 		prov := &chunktest.TestAuth{
 			FakeToken:      "xoxp-1234567890-1234567890-1234567890-1234567890",
 			WantHTTPClient: http.DefaultClient,
 		}
+		ctx := context.Background()
 		sess, err := slackdump.New(ctx, prov, slackdump.WithSlackClient(cl), slackdump.WithLimits(network.NoLimits))
 		if err != nil {
 			t.Fatal(err)
diff --git a/cmd/slackdump/internal/format/format.go b/cmd/slackdump/internal/format/format.go
index 025bceee..1da88e05 100644
--- a/cmd/slackdump/internal/format/format.go
+++ b/cmd/slackdump/internal/format/format.go
@@ -20,7 +20,6 @@ import (
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/golang/base"
 	"github.com/rusq/slackdump/v3/internal/cache"
 	"github.com/rusq/slackdump/v3/internal/format"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 )
 
@@ -111,13 +110,13 @@ type idextractor interface {
 func convert(ctx context.Context, w io.Writer, cvt format.Formatter, rs io.ReadSeeker) error {
 	ctx, task := trace.NewTask(ctx, "convert")
 	defer task.End()
-	lg := logger.FromContext(ctx)
+	lg := cfg.Log
 
 	dump, err := detectAndRead(rs)
 	if err != nil {
 		return err
 	}
-	lg.Printf("Detected dump type: %q", dump.filetype)
+	lg.InfoContext(ctx, "Successfully detected file type", "type", dump.filetype)
 
 	if dump.filetype == dtUsers {
 		// special case.  Users do not need to have users fetched from slack etc,
diff --git a/cmd/slackdump/internal/list/channels.go b/cmd/slackdump/internal/list/channels.go
index 7bebcc0e..d10257c1 100644
--- a/cmd/slackdump/internal/list/channels.go
+++ b/cmd/slackdump/internal/list/channels.go
@@ -3,7 +3,6 @@ package list
 import (
 	"context"
 	"fmt"
-	"log"
 	"runtime/trace"
 	"time"
 
@@ -13,7 +12,6 @@ import (
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/cfg"
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/golang/base"
 	"github.com/rusq/slackdump/v3/internal/cache"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 )
 
@@ -116,11 +114,10 @@ func (l *channels) Retrieve(ctx context.Context, sess *slackdump.Session, m *cac
 	go func() {
 		defer close(usersc)
 		if l.opts.resolveUsers {
-
-			lg.Println("getting users to resolve DM names")
+			lg.InfoContext(ctx, "getting users to resolve DM names")
 			u, err := fetchUsers(ctx, sess, m, cfg.NoUserCache, teamID)
 			if err != nil {
-				log.Printf("error getting users to resolve DM names (ignored): %s", err)
+				lg.ErrorContext(ctx, "error getting users to resolve DM names", "error", err)
 				return
 			}
 			usersc <- u
@@ -142,7 +139,7 @@ func (l *channels) Retrieve(ctx context.Context, sess *slackdump.Session, m *cac
 	l.channels = cc
 	l.users = <-usersc
 	if err := m.CacheChannels(teamID, cc); err != nil {
-		logger.FromContext(ctx).Printf("warning: failed to cache channels (ignored): %s", err)
+		lg.WarnContext(ctx, "failed to cache channels (ignored)", "error", err)
 	}
 	return nil
 }
diff --git a/cmd/slackdump/internal/list/common.go b/cmd/slackdump/internal/list/common.go
index f9e259ca..eafa7a44 100644
--- a/cmd/slackdump/internal/list/common.go
+++ b/cmd/slackdump/internal/list/common.go
@@ -13,7 +13,6 @@ import (
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/golang/base"
 	"github.com/rusq/slackdump/v3/internal/cache"
 	"github.com/rusq/slackdump/v3/internal/format"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 )
 
@@ -134,7 +133,7 @@ func saveData(ctx context.Context, data any, filename string, typ format.Type, u
 	if err := fmtPrint(ctx, f, data, typ, users); err != nil {
 		return err
 	}
-	logger.FromContext(ctx).Printf("Data saved to:  %q\n", filename)
+	cfg.Log.InfoContext(ctx, "Data saved", "filename", filename)
 
 	return nil
 }
diff --git a/cmd/slackdump/internal/list/users.go b/cmd/slackdump/internal/list/users.go
index 6e3ab60e..d72b1082 100644
--- a/cmd/slackdump/internal/list/users.go
+++ b/cmd/slackdump/internal/list/users.go
@@ -14,7 +14,6 @@ import (
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/golang/base"
 	"github.com/rusq/slackdump/v3/internal/cache"
 	"github.com/rusq/slackdump/v3/internal/osext"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 )
 
@@ -93,7 +92,7 @@ type userCacher interface {
 }
 
 func fetchUsers(ctx context.Context, ug userGetter, m userCacher, skipCache bool, teamID string) ([]slack.User, error) {
-	lg := logger.FromContext(ctx)
+	lg := cfg.Log.With("team_id", teamID, "cache", !skipCache)
 
 	if !skipCache {
 		// attempt to load from cache
@@ -107,7 +106,7 @@ func fetchUsers(ctx context.Context, ug userGetter, m userCacher, skipCache bool
 			// some funky error
 			return nil, err
 		}
-		lg.Println("user cache expired or empty, caching users")
+		lg.InfoContext(ctx, "user cache expired or empty, caching users")
 	}
 	// getting users from API
 	users, err := ug.GetUsers(ctx)
@@ -117,7 +116,7 @@ func fetchUsers(ctx context.Context, ug userGetter, m userCacher, skipCache bool
 
 	// saving users to cache, will ignore any errors, but notify the user.
 	if err := m.CacheUsers(teamID, users); err != nil {
-		lg.Printf("warning: failed saving user cache (ignored): %s", err)
+		lg.WarnContext(ctx, "failed saving user cache (ignored)", "error", err)
 	}
 
 	return users, nil
diff --git a/cmd/slackdump/internal/view/view.go b/cmd/slackdump/internal/view/view.go
index 616144a9..1b27a9a7 100644
--- a/cmd/slackdump/internal/view/view.go
+++ b/cmd/slackdump/internal/view/view.go
@@ -18,7 +18,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/chunk"
 	"github.com/rusq/slackdump/v3/internal/viewer"
 	"github.com/rusq/slackdump/v3/internal/viewer/source"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 var CmdView = &base.Command{
@@ -63,17 +62,17 @@ func RunView(ctx context.Context, cmd *base.Command, args []string) error {
 		v.Close()
 	}()
 
-	lg := logger.FromContext(ctx)
+	lg := cfg.Log
 
-	lg.Printf("listening on %s", listenAddr)
+	lg.InfoContext(ctx, "listening on", "addr", listenAddr)
 	go func() {
 		if err := br.OpenURL(fmt.Sprintf("http://%s", listenAddr)); err != nil {
-			lg.Printf("unable to open browser: %s", err)
+			lg.WarnContext(ctx, "unable to open browser", "error", err)
 		}
 	}()
 	if err := v.ListenAndServe(); err != nil {
 		if errors.Is(err, http.ErrServerClosed) {
-			lg.Print("bye")
+			lg.InfoContext(ctx, "bye")
 			return nil
 		}
 		base.SetExitStatus(base.SApplicationError)
@@ -95,38 +94,38 @@ const (
 )
 
 func loadSource(ctx context.Context, src string) (viewer.Sourcer, error) {
-	lg := logger.FromContext(ctx)
+	lg := cfg.Log.With("source", src)
 	fi, err := os.Stat(src)
 	if err != nil {
 		return nil, err
 	}
 	switch srcType(src, fi) {
 	case sfChunk | sfDirectory:
-		lg.Debugf("loading chunk directory: %s", src)
+		lg.DebugContext(ctx, "loading chunk directory")
 		dir, err := chunk.OpenDir(src)
 		if err != nil {
 			return nil, err
 		}
 		return source.NewChunkDir(dir), nil
 	case sfExport | sfZIP:
-		lg.Debugf("loading export zip: %s", src)
+		lg.DebugContext(ctx, "loading export zip")
 		f, err := zip.OpenReader(src)
 		if err != nil {
 			return nil, err
 		}
 		return source.NewExport(f, src)
 	case sfExport | sfDirectory:
-		lg.Debugf("loading export directory: %s", src)
+		lg.DebugContext(ctx, "loading export directory")
 		return source.NewExport(os.DirFS(src), src)
 	case sfDump | sfZIP:
-		lg.Debugf("loading dump zip: %s", src)
+		lg.DebugContext(ctx, "loading dump zip")
 		f, err := zip.OpenReader(src)
 		if err != nil {
 			return nil, err
 		}
 		return source.NewDump(f, src)
 	case sfDump | sfDirectory:
-		lg.Debugf("loading dump directory: %s", src)
+		lg.DebugContext(ctx, "loading dump directory")
 		return source.NewDump(os.DirFS(src), src)
 	default:
 		return nil, fmt.Errorf("unsupported source type: %s", src)
diff --git a/cmd/slackdump/internal/workspace/import.go b/cmd/slackdump/internal/workspace/import.go
index dcb26ef7..0d431437 100644
--- a/cmd/slackdump/internal/workspace/import.go
+++ b/cmd/slackdump/internal/workspace/import.go
@@ -59,7 +59,8 @@ func importFile(ctx context.Context, filename string) error {
 		base.SetExitStatus(base.SCacheError)
 		return err
 	}
-	cfg.Log.Printf("Workspace %q added and selected. It is advised that you delete the file %q", wsp, filename)
+	cfg.Log.InfoContext(ctx, "Workspace added and selected", "workspace", wsp)
+	cfg.Log.InfoContext(ctx, "It is advised that you delete the file", "filename", filename)
 
 	return nil
 }
diff --git a/cmd/slackdump/internal/workspace/new.go b/cmd/slackdump/internal/workspace/new.go
index 13521d91..55846559 100644
--- a/cmd/slackdump/internal/workspace/new.go
+++ b/cmd/slackdump/internal/workspace/new.go
@@ -79,7 +79,7 @@ func createWsp(ctx context.Context, m manager, wsp string, confirm bool) error {
 		}
 	}
 
-	lg.Debugln("requesting authentication...")
+	lg.DebugContext(ctx, "requesting authentication...")
 	ad := cache.AuthData{
 		Token:         cfg.SlackToken,
 		Cookie:        cfg.SlackCookie,
@@ -89,21 +89,21 @@ func createWsp(ctx context.Context, m manager, wsp string, confirm bool) error {
 	if err != nil {
 		if errors.Is(err, auth.ErrCancelled) {
 			base.SetExitStatus(base.SCancelled)
-			lg.Println(auth.ErrCancelled)
+			lg.WarnContext(ctx, auth.ErrCancelled.Error())
 			return ErrOpCancelled
 		}
 		base.SetExitStatus(base.SAuthError)
 		return err
 	}
 
-	lg.Debugf("selecting %q as current...", realname(wsp))
+	lg.Debug("selecting as current...", "workspace", realname(wsp))
 	// select it
 	if err := m.Select(realname(wsp)); err != nil {
 		base.SetExitStatus(base.SApplicationError)
 		return fmt.Errorf("failed to select the default workpace: %s", err)
 	}
 	fmt.Fprintf(os.Stdout, "Success:  added workspace %q\n", realname(wsp))
-	lg.Debugf("workspace %q, type %T", realname(wsp), prov)
+	lg.DebugContext(ctx, "workspace type", "workspace", realname(wsp), fmt.Sprintf("%T", prov))
 	return nil
 }
 
diff --git a/cmd/slackdump/internal/workspace/new_test.go b/cmd/slackdump/internal/workspace/new_test.go
index 15667351..4638abe3 100644
--- a/cmd/slackdump/internal/workspace/new_test.go
+++ b/cmd/slackdump/internal/workspace/new_test.go
@@ -3,16 +3,16 @@ package workspace
 import (
 	"context"
 	"errors"
+	"log/slog"
 	"testing"
 
 	"github.com/rusq/slackdump/v3/auth"
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/cfg"
-	"github.com/rusq/slackdump/v3/logger"
 	"go.uber.org/mock/gomock"
 )
 
 func init() {
-	cfg.Log = logger.Silent
+	cfg.Log = slog.Default()
 }
 
 func Test_createWsp(t *testing.T) {
diff --git a/cmd/slackdump/internal/workspace/wiz_select.go b/cmd/slackdump/internal/workspace/wiz_select.go
index c4dcb874..b9175f73 100644
--- a/cmd/slackdump/internal/workspace/wiz_select.go
+++ b/cmd/slackdump/internal/workspace/wiz_select.go
@@ -11,7 +11,6 @@ import (
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/golang/base"
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/workspace/workspaceui"
 	"github.com/rusq/slackdump/v3/internal/cache"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 // TODO: organise as a self-sufficient model with proper error handling.
@@ -54,7 +53,7 @@ func wizSelect(ctx context.Context, cmd *base.Command, args []string) error {
 			base.SetExitStatus(base.SWorkspaceError)
 			return fmt.Errorf("error setting the current workspace: %s", err)
 		}
-		logger.FromContext(ctx).Debugf("selected workspace: %s", newWsp)
+		cfg.Log.Debug("selected workspace", "workspace", newWsp)
 	}
 
 	return nil
diff --git a/cmd/slackdump/main.go b/cmd/slackdump/main.go
index 1c9d3650..dcb0960d 100644
--- a/cmd/slackdump/main.go
+++ b/cmd/slackdump/main.go
@@ -35,7 +35,6 @@ import (
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/view"
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/wizard"
 	"github.com/rusq/slackdump/v3/cmd/slackdump/internal/workspace"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 func init() {
@@ -124,7 +123,7 @@ BigCmdLoop:
 			}
 			if err := invoke(cmd, args); err != nil {
 				msg := fmt.Sprintf("Error %03[1]d (%[1]s): %[2]s", base.ExitStatus(), err)
-				logger.Default.Print(msg)
+				slog.Error(msg, "command", base.CmdName, "error", err, "code", base.ExitStatus(), "status", base.ExitStatus().String())
 			}
 			base.Exit()
 			return
@@ -179,8 +178,7 @@ func invoke(cmd *base.Command, args []string) error {
 	if lg, err := initLog(cfg.LogFile, cfg.Verbose); err != nil {
 		return err
 	} else {
-		lg.SetPrefix(cmd.Name() + ": ")
-		ctx = logger.NewContext(ctx, lg)
+		lg.With("command", cmd.Name())
 		cfg.Log = lg
 	}
 
@@ -249,24 +247,20 @@ func initTrace(filename string) error {
 // an error, if any. The stop function must be called in the deferred call, it
 // will close the log file, if it is open. If the error is returned the stop
 // function is nil.
-func initLog(filename string, verbose bool) (*dlog.Logger, error) {
-	lg := logger.Default
+func initLog(filename string, verbose bool) (*slog.Logger, error) {
 	if verbose {
 		slog.SetLogLoggerLevel(slog.LevelDebug)
-		lg.SetDebug(verbose)
-		lg.SetFlags(lg.Flags() | log.Lmicroseconds)
 	}
 
 	if filename == "" {
-		return lg, nil
+		return slog.Default(), nil
 	}
 
-	lg.Debugf("log messages will be written to: %q", filename)
+	slog.Debug("log messages will be written to file", "filename", filename)
 	lf, err := os.OpenFile(filename, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0666)
 	if err != nil {
-		return lg, fmt.Errorf("failed to create the log file: %w", err)
+		return slog.Default(), fmt.Errorf("failed to create the log file: %w", err)
 	}
-	lg.SetOutput(lf)
 	sl := slog.New(slog.NewTextHandler(lf, &slog.HandlerOptions{
 		Level: iftrue(verbose, slog.LevelDebug, slog.LevelInfo),
 	}))
@@ -278,7 +272,7 @@ func initLog(filename string, verbose bool) (*dlog.Logger, error) {
 		}
 	})
 
-	return lg, nil
+	return slog.Default(), nil
 }
 
 func iftrue[T any](cond bool, t T, f T) T {
diff --git a/downloader/deprecated.go b/downloader/deprecated.go
index 9fd5e6fa..d00dcea1 100644
--- a/downloader/deprecated.go
+++ b/downloader/deprecated.go
@@ -5,6 +5,7 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"log/slog"
 	"path"
 	"path/filepath"
 
@@ -14,7 +15,6 @@ import (
 	"golang.org/x/time/rate"
 
 	"github.com/rusq/fsadapter"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 const (
@@ -72,7 +72,7 @@ func WorkersV1(n int) OptionV1 {
 
 // LoggerV1 allows to use an external log library, that satisfies the
 // logger.Interface.
-func LoggerV1(l logger.Interface) OptionV1 {
+func LoggerV1(l *slog.Logger) OptionV1 {
 	return func(c *ClientV1) {
 		WithLogger(l)(c.v2)
 	}
diff --git a/downloader/deprecated_test.go b/downloader/deprecated_test.go
index a61ec32b..9f41d6d2 100644
--- a/downloader/deprecated_test.go
+++ b/downloader/deprecated_test.go
@@ -2,7 +2,7 @@ package downloader
 
 import (
 	"context"
-	"log"
+	"log/slog"
 	"os"
 	"path"
 	"path/filepath"
@@ -17,11 +17,9 @@ import (
 	gomock "go.uber.org/mock/gomock"
 	"golang.org/x/time/rate"
 
-	"github.com/rusq/dlog"
 	"github.com/rusq/fsadapter"
 	"github.com/rusq/slackdump/v3/internal/fixtures"
 	"github.com/rusq/slackdump/v3/internal/mocks/mock_downloader"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 var (
@@ -264,7 +262,7 @@ func TestSession_newFileDownloader(t *testing.T) {
 				limiter: tl,
 				retries: 3,
 				workers: 4,
-				lg:      dlog.New(os.Stderr, "unit ", log.LstdFlags+log.Lshortfile, true),
+				lg:      slog.Default(),
 			},
 			nameFn: Filename,
 		}
@@ -301,7 +299,7 @@ func TestSession_worker(t *testing.T) {
 				limiter: tl,
 				retries: defRetries,
 				workers: defNumWorkers,
-				lg:      dlog.New(os.Stderr, "unit ", log.LstdFlags+log.Lshortfile, true),
+				lg:      slog.Default(),
 			},
 			nameFn: Filename,
 		}
@@ -374,7 +372,7 @@ func TestClient_startWorkers(t *testing.T) {
 				fsa:     fsadapter.NewDirectory(t.TempDir()),
 				limiter: rate.NewLimiter(5000, 1),
 				workers: defNumWorkers,
-				lg:      logger.Default,
+				lg:      slog.Default(),
 			},
 			nameFn: Filename,
 		}
@@ -445,7 +443,7 @@ func clientWithMock(t *testing.T, dir string) *ClientV1 {
 			fsa:     fsadapter.NewDirectory(dir),
 			limiter: rate.NewLimiter(5000, 1),
 			workers: defNumWorkers,
-			lg:      logger.Default,
+			lg:      slog.Default(),
 		},
 		nameFn: Filename,
 	}
diff --git a/downloader/downloader.go b/downloader/downloader.go
index 1d13af50..f0c144b6 100644
--- a/downloader/downloader.go
+++ b/downloader/downloader.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"hash/crc64"
 	"io"
+	"log/slog"
 	"os"
 	"path"
 	"runtime/trace"
@@ -12,7 +13,6 @@ import (
 
 	"github.com/rusq/fsadapter"
 	"github.com/rusq/slackdump/v3/internal/network"
-	"github.com/rusq/slackdump/v3/logger"
 	"golang.org/x/time/rate"
 )
 
@@ -21,7 +21,7 @@ type Client struct {
 	sc      Downloader
 	limiter *rate.Limiter
 	fsa     fsadapter.FS
-	lg      logger.Interface
+	lg      *slog.Logger
 
 	retries int
 	workers int
@@ -66,11 +66,11 @@ func Workers(n int) Option {
 }
 
 // Logger allows to use an external log library, that satisfies the
-// logger.Interface.
-func WithLogger(l logger.Interface) Option {
+// *slog.Logger.
+func WithLogger(l *slog.Logger) Option {
 	return func(c *Client) {
 		if l == nil {
-			l = logger.Default
+			l = slog.Default()
 		}
 		c.lg = l
 	}
@@ -86,7 +86,7 @@ func New(sc Downloader, fs fsadapter.FS, opts ...Option) *Client {
 		sc:        sc,
 		fsa:       fs,
 		limiter:   rate.NewLimiter(defLimit, 1),
-		lg:        logger.Default,
+		lg:        slog.Default(),
 		chanBufSz: defFileBufSz,
 		retries:   defRetries,
 		workers:   defNumWorkers,
@@ -133,7 +133,7 @@ func (c *Client) startWorkers(ctx context.Context, req <-chan Request) *sync.Wai
 		go func(workerNum int) {
 			c.worker(ctx, seen)
 			wg.Done()
-			c.lg.Debugf("download worker %d terminated", workerNum)
+			c.lg.DebugContext(ctx, "download worker terminated", "worker", workerNum)
 		}(i)
 	}
 	return &wg
@@ -183,13 +183,14 @@ func (c *Client) worker(ctx context.Context, reqC <-chan Request) {
 			if !moar {
 				return
 			}
-			c.lg.Debugf("saving %q to %s", path.Base(req.URL), req.Fullpath)
+			lg := c.lg.With("filename", path.Base(req.URL), "destination", req.Fullpath)
+			lg.DebugContext(ctx, "saving file")
 			n, err := c.download(ctx, req.Fullpath, req.URL)
 			if err != nil {
-				c.lg.Printf("error saving %q to %q: %s", path.Base(req.URL), req.Fullpath, err)
+				lg.ErrorContext(ctx, "error saving file", "error", err)
 				break
 			}
-			c.lg.Debugf("file %q saved to %s: %d bytes written", path.Base(req.URL), req.Fullpath, n)
+			lg.DebugContext(ctx, "file saved", "bytes_written", n)
 		}
 	}
 }
@@ -215,7 +216,7 @@ func (c *Client) download(ctx context.Context, fullpath string, url string) (int
 
 		if err := c.sc.GetFile(url, tf); err != nil {
 			if _, err := tf.Seek(0, io.SeekStart); err != nil {
-				c.lg.Debugf("seek error: %s", err)
+				c.lg.ErrorContext(ctx, "seek", "error", err)
 			}
 			return fmt.Errorf("download to %q failed, [src=%s]: %w", fullpath, url, err)
 		}
@@ -254,9 +255,9 @@ func (c *Client) Stop() {
 	}
 
 	close(c.requests)
-	c.lg.Debugf("requests channel closed, waiting for all downloads to complete")
+	c.lg.Debug("requests channel closed, waiting for all downloads to complete")
 	c.wg.Wait()
-	c.lg.Debugf("wait complete:  no more files to download")
+	c.lg.Debug("wait complete:  no more files to download")
 
 	c.requests = nil
 	c.wg = nil
@@ -283,7 +284,7 @@ func (c *Client) AsyncDownloader(ctx context.Context, queueC <-chan Request) (<-
 		defer close(done)
 		for r := range queueC {
 			if err := c.Download(r.Fullpath, r.URL); err != nil {
-				c.lg.Printf("error downloading %q: %s", r.URL, err)
+				c.lg.Error("download error", "url", r.URL, "error", err)
 			}
 		}
 		c.Stop()
diff --git a/downloader/downloader_test.go b/downloader/downloader_test.go
index 636d492e..6aa922d0 100644
--- a/downloader/downloader_test.go
+++ b/downloader/downloader_test.go
@@ -1,12 +1,17 @@
 package downloader
 
 import (
+	"log/slog"
 	"testing"
 
 	"github.com/rusq/slackdump/v3/internal/fixtures"
 	"github.com/stretchr/testify/assert"
 )
 
+func init() {
+	slog.SetLogLoggerLevel(slog.LevelDebug)
+}
+
 func Test_fltSeen(t *testing.T) {
 	t.Run("ensure that we don't get dup files", func(t *testing.T) {
 		source := []Request{
diff --git a/export/expfmt.go b/export/expfmt.go
index d93f7a94..0346ed8f 100644
--- a/export/expfmt.go
+++ b/export/expfmt.go
@@ -1,18 +1,19 @@
 package export
 
 import (
+	"log/slog"
+
 	"github.com/rusq/slack"
 
 	"github.com/rusq/fsadapter"
 	"github.com/rusq/slackdump/v3/internal/structures/files/dl"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 // newV2FileExporter returns the appropriate exporter for the ExportType.
-func newV2FileExporter(t ExportType, fs fsadapter.FS, cl *slack.Client, l logger.Interface, token string) dl.Exporter {
+func newV2FileExporter(t ExportType, fs fsadapter.FS, cl *slack.Client, l *slog.Logger, token string) dl.Exporter {
 	switch t {
 	default:
-		l.Printf("unknown export type %s, not downloading any files", t)
+		l.Warn("unknown export type, files won't be downloaded", "type", t)
 		fallthrough
 	case TNoDownload:
 		return dl.NewFileUpdater(token)
diff --git a/export/expfmt_test.go b/export/expfmt_test.go
index 8d015d08..e2564a7d 100644
--- a/export/expfmt_test.go
+++ b/export/expfmt_test.go
@@ -2,11 +2,11 @@ package export
 
 import (
 	"fmt"
+	"log/slog"
 	"testing"
 
 	"github.com/rusq/fsadapter"
 	"github.com/rusq/slack"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 func Test_newFileExporter(t *testing.T) {
@@ -14,7 +14,7 @@ func Test_newFileExporter(t *testing.T) {
 		t     ExportType
 		fs    fsadapter.FS
 		cl    *slack.Client
-		l     logger.Interface
+		l     *slog.Logger
 		token string
 	}
 	tests := []struct {
@@ -22,10 +22,10 @@ func Test_newFileExporter(t *testing.T) {
 		args  args
 		wantT string
 	}{
-		{"unknown is nodownload", args{t: ExportType(255), l: logger.Silent, token: "abcd"}, "dl.Nothing"},
-		{"no", args{t: TNoDownload, l: logger.Silent, token: "abcd"}, "dl.Nothing"},
-		{"standard", args{t: TStandard, fs: fsadapter.NewDirectory("."), cl: &slack.Client{}, l: logger.Silent, token: "abcd"}, "*dl.Std"},
-		{"mattermost", args{t: TMattermost, fs: fsadapter.NewDirectory("."), cl: &slack.Client{}, l: logger.Silent, token: "abcd"}, "*dl.Mattermost"},
+		{"unknown is nodownload", args{t: ExportType(255), l: slog.Default(), token: "abcd"}, "dl.Nothing"},
+		{"no", args{t: TNoDownload, l: slog.Default(), token: "abcd"}, "dl.Nothing"},
+		{"standard", args{t: TStandard, fs: fsadapter.NewDirectory("."), cl: &slack.Client{}, l: slog.Default(), token: "abcd"}, "*dl.Std"},
+		{"mattermost", args{t: TMattermost, fs: fsadapter.NewDirectory("."), cl: &slack.Client{}, l: slog.Default(), token: "abcd"}, "*dl.Mattermost"},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
diff --git a/export/export.go b/export/export.go
index 5898e2df..cf561363 100644
--- a/export/export.go
+++ b/export/export.go
@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"path/filepath"
 	"runtime/trace"
 
@@ -15,7 +16,6 @@ import (
 	"github.com/rusq/slackdump/v3"
 	"github.com/rusq/slackdump/v3/internal/structures"
 	"github.com/rusq/slackdump/v3/internal/structures/files/dl"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 )
 
@@ -23,7 +23,7 @@ import (
 type Export struct {
 	fs fsadapter.FS // target filesystem
 	sd dumper       // Session instance
-	lg logger.Interface
+	lg *slog.Logger
 	dl dl.Exporter
 
 	// options
@@ -34,7 +34,7 @@ type Export struct {
 // provided fs.
 func New(sd *slackdump.Session, fs fsadapter.FS, cfg Config) *Export {
 	if cfg.Logger == nil {
-		cfg.Logger = logger.Default
+		cfg.Logger = slog.Default()
 	}
 
 	se := &Export{
@@ -76,8 +76,10 @@ func (se *Export) messages(ctx context.Context, users types.Users) error {
 		se.dl.Start(ctx)
 		defer func() {
 			se.td(ctx, "info", "waiting for downloads to finish")
+			se.lg.DebugContext(ctx, "waiting for downloads to finish")
 			se.dl.Stop()
 			se.td(ctx, "info", "dl stopped")
+			se.lg.DebugContext(ctx, "downloader stopped")
 		}()
 	}
 
@@ -123,7 +125,7 @@ func (se *Export) exclusiveExport(ctx context.Context, uidx structures.UserIndex
 	if err := se.sd.StreamChannels(ctx, slackdump.AllChanTypes, func(ch slack.Channel) error {
 		if listIdx.IsExcluded(ch.ID) {
 			trace.Logf(ctx, "info", "skipping %s", ch.ID)
-			se.lg.Printf("skipping: %s", ch.ID)
+			se.lg.InfoContext(ctx, "skipping (excluded)", "channel_id", ch.ID)
 			return nil
 		}
 		if err := se.exportConversation(ctx, uidx, ch); err != nil {
@@ -136,7 +138,7 @@ func (se *Export) exclusiveExport(ctx context.Context, uidx structures.UserIndex
 	}); err != nil {
 		return nil, fmt.Errorf("channels: error: %w", err)
 	}
-	se.lg.Printf("  out of which exported:  %d", len(chans))
+	se.lg.InfoContext(ctx, "  out of which exported:  ", "n", len(chans))
 	return chans, nil
 }
 
@@ -160,7 +162,7 @@ func (se *Export) inclusiveExport(ctx context.Context, uidx structures.UserIndex
 	for _, entry := range list.Include {
 		if elIdx.IsExcluded(entry) {
 			se.td(ctx, "info", "skipping %s", entry)
-			se.lg.Printf("skipping: %s", entry)
+			se.lg.InfoContext(ctx, "skipping (excluded)", "entry", entry)
 			continue
 		}
 		sl, err := structures.ParseLink(entry)
@@ -257,6 +259,5 @@ func serialize(w io.Writer, data any) error {
 
 // td outputs the message to trace and logs a debug message.
 func (se *Export) td(ctx context.Context, category string, fmt string, a ...any) {
-	se.lg.Debugf(fmt, a...)
 	trace.Logf(ctx, category, fmt, a...)
 }
diff --git a/export/options.go b/export/options.go
index fa647091..99c5aac9 100644
--- a/export/options.go
+++ b/export/options.go
@@ -1,17 +1,17 @@
 package export
 
 import (
+	"log/slog"
 	"time"
 
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 // Config allows to configure slack export options.
 type Config struct {
 	Oldest      time.Time
 	Latest      time.Time
-	Logger      logger.Interface
+	Logger      *slog.Logger
 	List        *structures.EntityList
 	Type        ExportType
 	MemberOnly  bool
diff --git a/export/options_test.go b/export/options_test.go
index a7996cb3..5c3c1fc7 100644
--- a/export/options_test.go
+++ b/export/options_test.go
@@ -1,18 +1,18 @@
 package export
 
 import (
+	"log/slog"
 	"testing"
 	"time"
 
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 func TestOptions_IsFilesEnabled(t *testing.T) {
 	type fields struct {
 		Oldest      time.Time
 		Latest      time.Time
-		Logger      logger.Interface
+		Logger      *slog.Logger
 		List        *structures.EntityList
 		Type        ExportType
 		ExportToken string
diff --git a/internal/cache/auth.go b/internal/cache/auth.go
index 2245a815..4e55f6f8 100644
--- a/internal/cache/auth.go
+++ b/internal/cache/auth.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -14,7 +15,6 @@ import (
 	"github.com/rusq/encio"
 
 	"github.com/rusq/slackdump/v3/auth"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 const ezLogin = "EZ-Login 3000"
@@ -155,13 +155,14 @@ func initProvider(ctx context.Context, cacheDir string, filename string, workspa
 	}
 
 	// try to load the existing credentials, if saved earlier.
-	lg := logger.FromContext(ctx)
+	lg := slog.With("cache_dir", cacheDir, "filename", filename, "workspace", workspace)
 	if creds == nil || creds.IsEmpty() {
 		if prov, err := tryLoad(ctx, credsFile); err != nil {
 			msg := fmt.Sprintf("failed to load saved credentials: %s", err)
 			trace.Log(ctx, "warn", msg)
+			slog.DebugContext(ctx, msg)
 			if auth.IsInvalidAuthErr(err) {
-				lg.Println("authentication details expired, relogin is necessary")
+				lg.InfoContext(ctx, "authentication details expired, relogin is necessary")
 			}
 		} else {
 			msg := "loaded saved credentials"
diff --git a/internal/chunk/control/control.go b/internal/chunk/control/control.go
index e933101c..035a957d 100644
--- a/internal/chunk/control/control.go
+++ b/internal/chunk/control/control.go
@@ -9,6 +9,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log/slog"
 	"runtime/trace"
 	"sync"
 
@@ -18,7 +19,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/chunk"
 	"github.com/rusq/slackdump/v3/internal/chunk/dirproc"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/processor"
 )
 
@@ -36,7 +36,7 @@ type Controller struct {
 	// it's not necessary for all use cases.
 	filer processor.Filer
 	// lg is the logger
-	lg logger.Interface
+	lg *slog.Logger
 	// flags
 	flags Flags
 }
@@ -68,7 +68,7 @@ func WithTransformer(tf ExportTransformer) Option {
 }
 
 // WithLogger configures the controller with a logger.
-func WithLogger(lg logger.Interface) Option {
+func WithLogger(lg *slog.Logger) Option {
 	return func(c *Controller) {
 		if lg != nil {
 			c.lg = lg
@@ -83,7 +83,7 @@ func New(cd *chunk.Directory, s Streamer, opts ...Option) *Controller {
 		s:     s,
 		filer: &noopFiler{},
 		tf:    &noopTransformer{},
-		lg:    logger.Default,
+		lg:    slog.Default(),
 	}
 	for _, opt := range opts {
 		opt(c)
@@ -111,10 +111,10 @@ func (e Error) Error() string {
 }
 
 func (c *Controller) Run(ctx context.Context, list *structures.EntityList) error {
-	ctx, task := trace.NewTask(logger.NewContext(ctx, c.lg), "Controller.Run")
+	ctx, task := trace.NewTask(ctx, "Controller.Run")
 	defer task.End()
 
-	lg := c.lg
+	lg := c.lg.With("in", "controller.Run")
 
 	var (
 		wg    sync.WaitGroup
@@ -136,7 +136,7 @@ func (c *Controller) Run(ctx context.Context, list *structures.EntityList) error
 		go func() {
 			defer wg.Done()
 			defer close(linkC)
-			defer lg.Debug("channels done")
+			defer lg.DebugContext(ctx, "channels done")
 
 			if err := generator(ctx, linkC, list); err != nil {
 				errC <- Error{"channel generator", "generator", err}
@@ -149,7 +149,7 @@ func (c *Controller) Run(ctx context.Context, list *structures.EntityList) error
 		wg.Add(1)
 		go func() {
 			defer wg.Done()
-			defer lg.Debug("workspace info done")
+			defer lg.DebugContext(ctx, "workspace info done")
 			if err := workspaceWorker(ctx, c.s, c.cd); err != nil {
 				errC <- Error{"workspace", "worker", err}
 				return
@@ -244,7 +244,6 @@ func genChFromAPI(s Streamer, cd *chunk.Directory, memberOnly bool) linkFeederFu
 				case <-ctx.Done():
 					return context.Cause(ctx)
 				case links <- ch.ID:
-
 				}
 			}
 			return nil
@@ -259,7 +258,7 @@ func genChFromAPI(s Streamer, cd *chunk.Directory, memberOnly bool) linkFeederFu
 		if err := chanproc.Close(); err != nil {
 			return fmt.Errorf("error closing channel processor: %w", err)
 		}
-		logger.FromContext(ctx).Debug("channels done")
+		slog.DebugContext(ctx, "channels done")
 		return nil
 	}
 }
diff --git a/internal/chunk/control/search.go b/internal/chunk/control/search.go
index 186e0719..1f7c631f 100644
--- a/internal/chunk/control/search.go
+++ b/internal/chunk/control/search.go
@@ -19,7 +19,7 @@ func (s *Controller) SearchMessages(ctx context.Context, query string) error {
 	if err := eg.Wait(); err != nil {
 		return err
 	}
-	s.lg.Printf("search for query %q completed in: %s", query, time.Since(start))
+	s.lg.InfoContext(ctx, "search completed ", "query", query, "took", time.Since(start).String())
 	return nil
 }
 
@@ -35,7 +35,7 @@ func (s *Controller) SearchFiles(ctx context.Context, query string) error {
 	if err := eg.Wait(); err != nil {
 		return err
 	}
-	s.lg.Printf("search for query %q completed in: %s", query, time.Since(start))
+	s.lg.InfoContext(ctx, "search completed ", "query", query, "took", time.Since(start).String())
 	return nil
 }
 
@@ -54,6 +54,6 @@ func (s *Controller) SearchAll(ctx context.Context, query string) error {
 	if err := eg.Wait(); err != nil {
 		return err
 	}
-	s.lg.Printf("search for query %q completed in: %s", query, time.Since(start))
+	s.lg.InfoContext(ctx, "search completed ", "query", query, "took", time.Since(start).String())
 	return nil
 }
diff --git a/internal/chunk/control/workers.go b/internal/chunk/control/workers.go
index 42daea54..13cf408b 100644
--- a/internal/chunk/control/workers.go
+++ b/internal/chunk/control/workers.go
@@ -4,13 +4,13 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log/slog"
 	"runtime/trace"
 
 	"github.com/rusq/slack"
 	"github.com/rusq/slackdump/v3/internal/chunk"
 	"github.com/rusq/slackdump/v3/internal/chunk/dirproc"
 	"github.com/rusq/slackdump/v3/internal/chunk/transform"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/processor"
 )
 
@@ -32,7 +32,7 @@ func userWorker(ctx context.Context, s Streamer, chunkdir *chunk.Directory, tf T
 	if err := userproc.Close(); err != nil {
 		return fmt.Errorf("error closing user processor: %w", err)
 	}
-	logger.FromContext(ctx).Debug("users done")
+	slog.DebugContext(ctx, "users done")
 	if len(users) == 0 {
 		return fmt.Errorf("unable to proceed, no users found")
 	}
@@ -43,7 +43,7 @@ func userWorker(ctx context.Context, s Streamer, chunkdir *chunk.Directory, tf T
 }
 
 func conversationWorker(ctx context.Context, s Streamer, proc processor.Conversations, links <-chan string) error {
-	lg := logger.FromContext(ctx)
+	lg := slog.Default()
 	if err := s.Conversations(ctx, proc, links); err != nil {
 		if errors.Is(err, transform.ErrClosed) {
 			return fmt.Errorf("upstream error: %w", err)
@@ -55,7 +55,7 @@ func conversationWorker(ctx context.Context, s Streamer, proc processor.Conversa
 }
 
 func workspaceWorker(ctx context.Context, s Streamer, cd *chunk.Directory) error {
-	lg := logger.FromContext(ctx)
+	lg := slog.Default()
 	lg.Debug("workspaceWorker started")
 	wsproc, err := dirproc.NewWorkspace(cd)
 	if err != nil {
@@ -73,7 +73,7 @@ func searchMsgWorker(ctx context.Context, s Streamer, filer processor.Filer, cd
 	ctx, task := trace.NewTask(ctx, "searchMsgWorker")
 	defer task.End()
 
-	lg := logger.FromContext(ctx)
+	lg := slog.Default()
 	lg.Debug("searchMsgWorker started")
 	search, err := dirproc.NewSearch(cd, filer)
 	if err != nil {
@@ -91,7 +91,7 @@ func searchFileWorker(ctx context.Context, s Streamer, filer processor.Filer, cd
 	ctx, task := trace.NewTask(ctx, "searchMsgWorker")
 	defer task.End()
 
-	lg := logger.FromContext(ctx)
+	lg := slog.Default()
 	lg.Debug("searchFileWorker started")
 	search, err := dirproc.NewSearch(cd, filer)
 	if err != nil {
diff --git a/internal/chunk/dirproc/conversations.go b/internal/chunk/dirproc/conversations.go
index 70cdc4fc..dfe0b948 100644
--- a/internal/chunk/dirproc/conversations.go
+++ b/internal/chunk/dirproc/conversations.go
@@ -4,11 +4,11 @@ import (
 	"context"
 	"errors"
 	"io"
+	"log/slog"
 	"runtime/trace"
 
 	"github.com/rusq/slack"
 	"github.com/rusq/slackdump/v3/internal/chunk"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/processor"
 )
 
@@ -29,7 +29,7 @@ type Transformer interface {
 // Zero value is unusable.  Use [NewConversation] to create a new instance.
 type Conversations struct {
 	t  tracker
-	lg logger.Interface
+	lg *slog.Logger
 
 	// subproc is the files subprocessor, it is called by the Files method
 	// in addition to recording the files in the chunk file (if recordFiles is
@@ -73,7 +73,7 @@ type counter interface {
 type ConvOption func(*Conversations)
 
 // WithLogger sets the logger for the processor.
-func WithLogger(lg logger.Interface) ConvOption {
+func WithLogger(lg *slog.Logger) ConvOption {
 	return func(cv *Conversations) {
 		cv.lg = lg
 	}
@@ -105,7 +105,7 @@ func NewConversation(cd *chunk.Directory, filesSubproc processor.Filer, tf Trans
 
 	c := &Conversations{
 		t:       newFileTracker(cd),
-		lg:      logger.Default,
+		lg:      slog.Default(),
 		subproc: filesSubproc,
 		tf:      tf,
 	}
@@ -129,6 +129,8 @@ func (cv *Conversations) Messages(ctx context.Context, channelID string, numThre
 	ctx, task := trace.NewTask(ctx, "Messages")
 	defer task.End()
 
+	lg := cv.lg.With("in", "Messages", "channel_id", channelID, "num_threads", numThreads, "is_last", isLast, "len_messages", len(mm))
+	lg.Debug("started")
 	cv.debugtrace(ctx, "%s: Messages: numThreads=%d, isLast=%t, len(mm)=%d", channelID, numThreads, isLast, len(mm))
 
 	id := chunk.ToFileID(channelID, "", false)
@@ -137,7 +139,9 @@ func (cv *Conversations) Messages(ctx context.Context, channelID string, numThre
 		return err
 	}
 	n := r.Add(numThreads)
+
 	cv.debugtrace(ctx, "%s: Messages: increased by %d to %d", channelID, numThreads, n)
+	lg.DebugContext(ctx, "count increased", "by", numThreads, "current", n)
 
 	if err := r.Messages(ctx, channelID, numThreads, isLast, mm); err != nil {
 		return err
@@ -146,6 +150,7 @@ func (cv *Conversations) Messages(ctx context.Context, channelID string, numThre
 	if isLast {
 		n := r.Dec()
 		cv.debugtrace(ctx, "%s: Messages: decreased by 1 to %d, finalising", channelID, n)
+		lg.DebugContext(ctx, "count decreased", "by", 1, "current", n)
 		return cv.finalise(ctx, id)
 	}
 	return nil
@@ -157,6 +162,8 @@ func (cv *Conversations) ThreadMessages(ctx context.Context, channelID string, p
 	ctx, task := trace.NewTask(ctx, "ThreadMessages")
 	defer task.End()
 
+	lg := cv.lg.With("in", "ThreadMessages", "channel_id", channelID, "parent_ts", parent.ThreadTimestamp, "is_last", isLast, "len(tm)", len(tm))
+	lg.Debug("started")
 	cv.debugtrace(ctx, "%s: ThreadMessages: parent=%s, isLast=%t, len(tm)=%d", channelID, parent.ThreadTimestamp, isLast, len(tm))
 
 	id := chunk.ToFileID(channelID, parent.ThreadTimestamp, threadOnly)
@@ -169,6 +176,7 @@ func (cv *Conversations) ThreadMessages(ctx context.Context, channelID string, p
 	}
 	if isLast {
 		n := r.Dec()
+		lg.DebugContext(ctx, "count decreased, finalising", "by", 1, "current", n)
 		cv.debugtrace(ctx, "%s:%s: ThreadMessages: decreased by 1 to %d, finalising", id, parent.Timestamp, n)
 		return cv.finalise(ctx, id)
 	}
@@ -177,10 +185,13 @@ func (cv *Conversations) ThreadMessages(ctx context.Context, channelID string, p
 
 // finalise closes the channel file if there are no more threads to process.
 func (cv *Conversations) finalise(ctx context.Context, id chunk.FileID) error {
+	lg := cv.lg.With("in", "finalise", "file_id", id)
 	if tc := cv.t.RefCount(id); tc > 0 {
+		lg.DebugContext(ctx, "not finalising", "ref_count", tc)
 		cv.debugtrace(ctx, "%s: finalise: not finalising, ref count = %d", id, tc)
 		return nil
 	}
+	lg.Debug("finalising", "ref_count", 0)
 	cv.debugtrace(ctx, "%s: finalise: ref count = 0, finalising...", id)
 	if err := cv.t.Unregister(id); err != nil {
 		return err
@@ -224,6 +235,5 @@ func (cv *Conversations) Close() error {
 }
 
 func (cv *Conversations) debugtrace(ctx context.Context, fmt string, args ...any) {
-	cv.lg.Debugf(fmt, args...)
 	trace.Logf(ctx, "debug", fmt, args...)
 }
diff --git a/internal/chunk/dirproc/conversations_test.go b/internal/chunk/dirproc/conversations_test.go
index 8a589792..a9326efa 100644
--- a/internal/chunk/dirproc/conversations_test.go
+++ b/internal/chunk/dirproc/conversations_test.go
@@ -3,12 +3,12 @@ package dirproc
 import (
 	"context"
 	"errors"
+	"log/slog"
 	"testing"
 
 	"github.com/rusq/slack"
 	"github.com/rusq/slackdump/v3/internal/chunk"
 	"github.com/rusq/slackdump/v3/internal/fixtures"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/mocks/mock_processor"
 	"github.com/rusq/slackdump/v3/processor"
 	"go.uber.org/mock/gomock"
@@ -152,7 +152,7 @@ func TestConversations_Messages(t *testing.T) {
 			mh := NewMockdatahandler(ctrl)
 			cv := &Conversations{
 				t:           mt,
-				lg:          logger.Default,
+				lg:          slog.Default(),
 				subproc:     tt.fields.subproc,
 				recordFiles: tt.fields.recordFiles,
 				tf:          tt.fields.tf,
@@ -305,7 +305,7 @@ func TestConversations_ThreadMessages(t *testing.T) {
 			mh := NewMockdatahandler(ctrl)
 			cv := &Conversations{
 				t:           mt,
-				lg:          logger.Default,
+				lg:          slog.Default(),
 				subproc:     tt.fields.subproc,
 				recordFiles: tt.fields.recordFiles,
 				tf:          tt.fields.tf,
@@ -400,7 +400,7 @@ func TestConversations_ChannelInfo(t *testing.T) {
 
 			cv := &Conversations{
 				t:           mt,
-				lg:          logger.Default,
+				lg:          slog.Default(),
 				subproc:     tt.fields.subproc,
 				recordFiles: tt.fields.recordFiles,
 				tf:          tt.fields.tf,
@@ -504,7 +504,7 @@ func TestConversations_finalise(t *testing.T) {
 			tt.expectFn(mt, mtf)
 			cv := &Conversations{
 				t:           mt,
-				lg:          logger.Default,
+				lg:          slog.Default(),
 				subproc:     tt.fields.subproc,
 				recordFiles: tt.fields.recordFiles,
 				tf:          mtf,
@@ -635,7 +635,7 @@ func TestConversations_Files(t *testing.T) {
 			tt.expectFn(mt, mfh, mf)
 			cv := &Conversations{
 				t:           mt,
-				lg:          logger.Default,
+				lg:          slog.Default(),
 				subproc:     mf,
 				recordFiles: tt.fields.recordFiles,
 				tf:          tt.fields.tf,
@@ -732,7 +732,7 @@ func TestConversations_ChannelUsers(t *testing.T) {
 			tt.expectFn(mt, mdh)
 			cv := &Conversations{
 				t:           mt,
-				lg:          logger.Default,
+				lg:          slog.Default(),
 				subproc:     tt.fields.subproc,
 				recordFiles: tt.fields.recordFiles,
 				tf:          tt.fields.tf,
diff --git a/internal/chunk/file.go b/internal/chunk/file.go
index 067b4470..0798d529 100644
--- a/internal/chunk/file.go
+++ b/internal/chunk/file.go
@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"log/slog"
 	"path/filepath"
 	"runtime/trace"
 	"sort"
@@ -20,7 +21,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/chunk/state"
 	"github.com/rusq/slackdump/v3/internal/fasttime"
 	"github.com/rusq/slackdump/v3/internal/osext"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 var (
@@ -126,7 +126,7 @@ func indexChunks(dec decoder) (index, error) {
 		idx[id] = append(idx[id], offset)
 	}
 
-	logger.Default.Debugf("indexing chunks: %d: called from %v, took %s (%.2f/sec)", len(idx), osext.Caller(2), time.Since(start), float64(len(idx))/time.Since(start).Seconds())
+	slog.Default().Debug("indexing chunks", "len(idx)", len(idx), "caller", osext.Caller(2), "took", time.Since(start).String(), "took", float64(len(idx))/time.Since(start).Seconds())
 	return idx, nil
 }
 
@@ -136,7 +136,7 @@ func (f *File) ensure() {
 		var err error
 		f.idx, err = indexChunks(json.NewDecoder(f.rs))
 		if err != nil {
-			log.Panicf("%s: index error: %s", osext.Caller(1), err)
+			log.Panicf("internal error: %s: index error: %s", osext.Caller(1), err)
 		}
 	}
 }
@@ -278,14 +278,14 @@ func (f *File) AllChannelInfos() ([]slack.Channel, error) {
 	}
 	for i := range chans {
 		if chans[i].IsArchived {
-			logger.Default.Debugf("skipping archived channel %s", chans[i].ID)
+			slog.Default().Debug("skipping archived channel", "i", i, "id", chans[i].ID)
 			continue
 		}
 		members, err := f.ChannelUsers(chans[i].ID)
 		if err != nil {
 			if errors.Is(err, ErrNotFound) {
 				// ignoring missing channel users
-				logger.Default.Printf("no users for channel %s: %v (never mind, let's continue)", chans[i].ID, err)
+				slog.Default().Warn("no users", "channel_id", chans[i].ID, "error", err)
 				continue
 			}
 			return nil, err
diff --git a/internal/chunk/filemgr.go b/internal/chunk/filemgr.go
index d0931df6..67a5bab6 100644
--- a/internal/chunk/filemgr.go
+++ b/internal/chunk/filemgr.go
@@ -7,10 +7,9 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"os"
 	"sync"
-
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 // filemgr manages temporary files and handles for compressed files.
@@ -28,7 +27,7 @@ func newFileMgr() (*filemgr, error) {
 	if err != nil {
 		return nil, err
 	}
-	logger.Default.Debugf("created temporary directory: %s", tmpdir)
+	slog.Default().Debug("created temporary directory", "dir", tmpdir)
 	return &filemgr{
 		tmpdir:  tmpdir,
 		once:    new(sync.Once),
@@ -50,7 +49,7 @@ func (dp *filemgr) Destroy() error {
 	var errcount int
 	for hash, f := range dp.handles {
 		if err := f.Close(); err != nil {
-			logger.Default.Printf("error closing file: %v", err)
+			slog.Default().Error("error closing file", "err", err)
 			errcount++
 			continue
 		}
diff --git a/internal/chunk/transform/coordinator.go b/internal/chunk/transform/coordinator.go
index e8f9c9f4..534c5ae8 100644
--- a/internal/chunk/transform/coordinator.go
+++ b/internal/chunk/transform/coordinator.go
@@ -3,9 +3,9 @@ package transform
 import (
 	"context"
 	"errors"
+	"log/slog"
 
 	"github.com/rusq/slackdump/v3/internal/chunk"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 type COption func(*Coordinator)
@@ -42,12 +42,13 @@ func NewCoordinator(ctx context.Context, cvt Converter, opts ...COption) *Coordi
 }
 
 func (c *Coordinator) worker(ctx context.Context) {
-	lg := logger.FromContext(ctx)
 	defer close(c.errC)
 
+	lg := slog.Default()
+
 	for id := range c.idC {
 		if err := c.cvt.Convert(ctx, id); err != nil {
-			lg.Printf("error converting %q: %v", id, err)
+			lg.Error("worker: conversion failed", "id", id, "error", err)
 			c.errC <- err
 		}
 	}
diff --git a/internal/chunk/transform/export.go b/internal/chunk/transform/export.go
index 93b5209e..f906fa79 100644
--- a/internal/chunk/transform/export.go
+++ b/internal/chunk/transform/export.go
@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"log/slog"
 	"path/filepath"
 	"runtime/trace"
 	"sort"
@@ -17,7 +18,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/chunk"
 	"github.com/rusq/slackdump/v3/internal/fasttime"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 )
 
@@ -67,11 +67,11 @@ func (e *ExpConverter) Convert(ctx context.Context, id chunk.FileID) error {
 	ctx, task := trace.NewTask(ctx, "transform")
 	defer task.End()
 
-	lg := logger.FromContext(ctx)
+	lg := slog.With("file_id", id)
 	{
 		userCnt := len(e.users)
 		trace.Logf(ctx, "input", "len(users)=%d", userCnt)
-		lg.Debugf("transforming channel %s, user len=%d", id, userCnt)
+		lg.DebugContext(ctx, "transforming channel", "id", id, "user_count", userCnt)
 	}
 
 	// load the chunk file
@@ -95,7 +95,7 @@ func (e *ExpConverter) Convert(ctx context.Context, id chunk.FileID) error {
 }
 
 func (e *ExpConverter) writeMessages(ctx context.Context, pl *chunk.File, ci *slack.Channel) error {
-	lg := logger.FromContext(ctx)
+	lg := slog.With("in", "writeMessages", "channel", ci.ID)
 	uidx := types.Users(e.users).IndexByID()
 	trgdir := ExportChanName(ci)
 
@@ -127,7 +127,7 @@ func (e *ExpConverter) writeMessages(ctx context.Context, pl *chunk.File, ci *sl
 				} else {
 					// this shouldn't happen as we have the guard in the if
 					// condition, but if it does (i.e. API changed), log it.
-					lg.Printf("not an error, possibly deleted thread: %q not found in chunk file", ci.ID+":"+m.ThreadTimestamp)
+					lg.Warn("not an error, possibly deleted thread not found in chunk file", "slack_link", ci.ID+":"+m.ThreadTimestamp)
 				}
 			}
 		}
diff --git a/internal/chunk/transform/export_coordinator.go b/internal/chunk/transform/export_coordinator.go
index acc47d5a..c1b13990 100644
--- a/internal/chunk/transform/export_coordinator.go
+++ b/internal/chunk/transform/export_coordinator.go
@@ -4,11 +4,11 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log/slog"
 	"sync/atomic"
 
 	"github.com/rusq/slack"
 	"github.com/rusq/slackdump/v3/internal/chunk"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 type UserConverter interface {
@@ -40,7 +40,7 @@ type UserConverter interface {
 //     channel that was completed.
 type ExportCoordinator struct {
 	cvt    UserConverter
-	lg     logger.Interface
+	lg     *slog.Logger
 	closed atomic.Bool
 
 	start chan struct{}
@@ -79,7 +79,7 @@ func WithUsers(users []slack.User) ExpOption {
 func NewExportCoordinator(ctx context.Context, cvt UserConverter, tfopt ...ExpOption) *ExportCoordinator {
 	t := &ExportCoordinator{
 		cvt:   cvt,
-		lg:    logger.FromContext(ctx),
+		lg:    slog.Default(),
 		start: make(chan struct{}),
 		ids:   make(chan chunk.FileID, bufferSz),
 		err:   make(chan error, 1),
@@ -109,7 +109,7 @@ func (t *ExportCoordinator) StartWithUsers(ctx context.Context, users []slack.Us
 // WithUsers option.  Otherwise, use [ExportCoordinator.StartWithUsers] method.
 // The function doesn't check if coordinator was already started or not.
 func (t *ExportCoordinator) Start(ctx context.Context) error {
-	t.lg.Debugln("transform: starting transform")
+	t.lg.DebugContext(ctx, "transform: starting transform")
 	if !t.cvt.HasUsers() {
 		return errors.New("internal error: users not initialised")
 	}
@@ -143,7 +143,7 @@ func (t *ExportCoordinator) Transform(ctx context.Context, id chunk.FileID) erro
 	if t.closed.Load() {
 		return ErrClosed
 	}
-	t.lg.Debugln("transform: placing channel in the queue", id)
+	t.lg.Debug("transform: placing channel (file) in the queue", "id", id)
 	t.ids <- id
 	return nil
 }
@@ -151,13 +151,15 @@ func (t *ExportCoordinator) Transform(ctx context.Context, id chunk.FileID) erro
 func (t *ExportCoordinator) worker(ctx context.Context) {
 	defer close(t.err)
 
-	t.lg.Debugln("transform: worker waiting")
+	lg := t.lg.With("in", "ExportCoordinator.worker")
+
+	lg.Debug("worker waiting")
 	<-t.start
-	t.lg.Debugln("transform: worker started")
+	lg.Debug("worker started")
 	for id := range t.ids {
-		t.lg.Debugf("transform: transforming channel %s", id)
+		lg.Debug("transforming channel", "channel_id", id)
 		if err := t.cvt.Convert(ctx, chunk.FileID(id)); err != nil {
-			t.lg.Debugf("transform: error transforming channel %s: %s", id, err)
+			lg.Debug("transforming channel failure", "channel_id", id, "error", err)
 			t.err <- err
 			continue
 		}
@@ -172,11 +174,11 @@ func (t *ExportCoordinator) Close() (err error) {
 	if t.closed.Load() {
 		return nil
 	}
-	t.lg.Debugln("transform: closing transform")
+	t.lg.Debug("transform: closing transform")
 	t.closed.Store(true)
 	close(t.ids)
 	close(t.start)
-	t.lg.Debugln("transform: waiting for workers to finish")
+	t.lg.Debug("transform: waiting for workers to finish")
 
 	return <-t.err
 }
diff --git a/internal/chunk/transform/fileproc/fileproc.go b/internal/chunk/transform/fileproc/fileproc.go
index f30678f2..306896f0 100644
--- a/internal/chunk/transform/fileproc/fileproc.go
+++ b/internal/chunk/transform/fileproc/fileproc.go
@@ -8,12 +8,12 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log/slog"
 
 	"github.com/rusq/fsadapter"
 	"github.com/rusq/slack"
 	"github.com/rusq/slackdump/v3/downloader"
 	"github.com/rusq/slackdump/v3/internal/structures/files"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 // Downloader is the interface that wraps the Download method.
@@ -117,7 +117,7 @@ func (NoopDownloader) Download(fullpath string, url string) error {
 
 // NewDownloader initializes the downloader and returns it, along with a
 // function that should be called to stop it.
-func NewDownloader(ctx context.Context, gEnabled bool, cl downloader.Downloader, fsa fsadapter.FS, lg logger.Interface) (sdl Downloader, stop func()) {
+func NewDownloader(ctx context.Context, gEnabled bool, cl downloader.Downloader, fsa fsadapter.FS, lg *slog.Logger) (sdl Downloader, stop func()) {
 	if !gEnabled {
 		return NoopDownloader{}, func() {}
 	} else {
diff --git a/internal/chunk/transform/standard.go b/internal/chunk/transform/standard.go
index 1f295305..9a0a3b2c 100644
--- a/internal/chunk/transform/standard.go
+++ b/internal/chunk/transform/standard.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"log/slog"
 	"sort"
 	"strings"
 
@@ -14,7 +15,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/fasttime"
 	"github.com/rusq/slackdump/v3/internal/nametmpl"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 )
 
@@ -38,7 +38,7 @@ func StdWithPipeline(f ...func(channelID string, threadTS string, mm []slack.Mes
 	}
 }
 
-func StdWithLogger(log logger.Interface) StdOption {
+func StdWithLogger(log *slog.Logger) StdOption {
 	return func(s *StdConverter) {
 		s.lg = log
 	}
@@ -49,7 +49,7 @@ func NewStandard(fsa fsadapter.FS, cd *chunk.Directory, opts ...StdOption) (*Std
 	std := &StdConverter{
 		cd:   cd,
 		fsa:  fsa,
-		lg:   logger.Default,
+		lg:   slog.Default(),
 		tmpl: nametmpl.NewDefault(),
 	}
 	for _, opt := range opts {
@@ -78,7 +78,7 @@ type StdConverter struct {
 	cd       *chunk.Directory // working chunk directory
 	fsa      fsadapter.FS     // output file system
 	tmpl     Templater        // file name template
-	lg       logger.Interface // logger
+	lg       *slog.Logger     // logger
 	pipeline []pipelineFunc   // pipeline filter functions
 }
 
diff --git a/internal/convert/chunkexp.go b/internal/convert/chunkexp.go
index 369fbd78..cf3a7eb6 100644
--- a/internal/convert/chunkexp.go
+++ b/internal/convert/chunkexp.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"os"
 	"path/filepath"
 	"runtime/trace"
@@ -15,7 +16,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/chunk"
 	"github.com/rusq/slackdump/v3/internal/chunk/transform"
 	"github.com/rusq/slackdump/v3/internal/chunk/transform/fileproc"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 const (
@@ -40,7 +40,7 @@ type ChunkToExport struct {
 	srcFileLoc func(*slack.Channel, *slack.File) string
 	trgFileLoc func(*slack.Channel, *slack.File) string
 
-	lg logger.Interface
+	lg *slog.Logger
 
 	workers int // number of workers to use to convert channels
 
@@ -76,7 +76,7 @@ func WithTrgFileLoc(fn func(*slack.Channel, *slack.File) string) C2EOption {
 }
 
 // WithLogger sets the logger.
-func WithLogger(lg logger.Interface) C2EOption {
+func WithLogger(lg *slog.Logger) C2EOption {
 	return func(c *ChunkToExport) {
 		if lg != nil {
 			c.lg = lg
@@ -91,7 +91,7 @@ func NewChunkToExport(src *chunk.Directory, trg fsadapter.FS, opt ...C2EOption)
 		includeFiles: false,
 		srcFileLoc:   fileproc.MattermostFilepath,
 		trgFileLoc:   fileproc.MattermostFilepath,
-		lg:           logger.Default,
+		lg:           slog.Default(),
 		request:      make(chan copyrequest, 1),
 		result:       make(chan copyresult, 1),
 		workers:      defWorkers,
@@ -140,8 +140,6 @@ func (c *ChunkToExport) Convert(ctx context.Context) error {
 	ctx, task := trace.NewTask(ctx, "convert.ChunkToExport")
 	defer task.End()
 
-	lg := logger.FromContext(ctx)
-
 	if err := c.Validate(); err != nil {
 		return err
 	}
@@ -190,7 +188,8 @@ func (c *ChunkToExport) Convert(ctx context.Context) error {
 			go func() {
 				defer wg.Done()
 				for ch := range chC {
-					lg.Debugf("processing channel %q", ch.ID)
+					lg := c.lg.With("channel", ch.ID)
+					lg.Debug("processing channel")
 					if err := conv.Convert(ctx, chunk.ToFileID(ch.ID, "", false)); err != nil {
 						errC <- fmt.Errorf("converter: failed to process %q: %w", ch.ID, err)
 						return
@@ -202,7 +201,7 @@ func (c *ChunkToExport) Convert(ctx context.Context) error {
 		wg.Add(1)
 		go func() {
 			defer wg.Done()
-			lg.Debugf("writing index for %s", c.src.Name())
+			c.lg.DebugContext(ctx, "writing index", "name", c.src.Name())
 			if err := conv.WriteIndex(); err != nil {
 				errC <- err
 			}
@@ -268,7 +267,7 @@ func (c *ChunkToExport) fileCopy(ch *slack.Channel, msg *slack.Message) error {
 	}
 	for _, f := range msg.Files {
 		if err := fileproc.IsValidWithReason(&f); err != nil {
-			c.lg.Printf("skipping file %q: %v", f.ID, err)
+			c.lg.Warn("skipping", "file", f.ID, "error", err)
 			continue
 		}
 
@@ -281,7 +280,7 @@ func (c *ChunkToExport) fileCopy(ch *slack.Channel, msg *slack.Message) error {
 		if _, err := os.Stat(srcpath); err != nil {
 			return &copyerror{f.ID, err}
 		}
-		c.lg.Debugf("copying %q to %q", srcpath, trgpath)
+		c.lg.Debug("copying", "srcpath", srcpath, "trgpath", trgpath)
 		if err := copy2trg(c.trg, trgpath, srcpath); err != nil {
 			return &copyerror{f.ID, err}
 		}
diff --git a/internal/convert/chunkexp_test.go b/internal/convert/chunkexp_test.go
index b2b72cde..f9445f3e 100644
--- a/internal/convert/chunkexp_test.go
+++ b/internal/convert/chunkexp_test.go
@@ -2,24 +2,22 @@ package convert
 
 import (
 	"context"
-	"log"
+	"log/slog"
 	"os"
 	"path/filepath"
 	"testing"
 
-	"github.com/rusq/dlog"
 	"github.com/rusq/fsadapter"
 	"github.com/rusq/slack"
 	"github.com/rusq/slackdump/v3/internal/chunk"
 	"github.com/rusq/slackdump/v3/internal/fixtures"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 const (
 	testSrcDir = "../../tmp/ora600" // TODO: fix manual nature of this/obfuscate
 )
 
-var testLogger = dlog.New(os.Stderr, "unit ", log.Lshortfile|log.LstdFlags, true)
+var testLogger = slog.Default()
 
 func TestChunkToExport_Validate(t *testing.T) {
 	fixtures.SkipInCI(t)
@@ -117,7 +115,8 @@ func TestChunkToExport_Convert(t *testing.T) {
 
 	c := NewChunkToExport(cd, fsa, WithIncludeFiles(true))
 
-	ctx := logger.NewContext(context.Background(), testLogger)
+	ctx := context.Background()
+	c.lg = testLogger
 	if err := c.Convert(ctx); err != nil {
 		t.Fatal(err)
 	}
diff --git a/internal/edge/edge.go b/internal/edge/edge.go
index 265e234c..7e8c351d 100644
--- a/internal/edge/edge.go
+++ b/internal/edge/edge.go
@@ -11,6 +11,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"net/http"
 	"net/url"
 	"os"
@@ -20,7 +21,6 @@ import (
 	"github.com/rusq/slack"
 	"github.com/rusq/slackauth"
 	"github.com/rusq/slackdump/v3/auth"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/tagops"
 )
 
@@ -212,7 +212,7 @@ func (cl *Client) PostForm(ctx context.Context, path string, form url.Values) (*
 func (cl *Client) record(b []byte) {
 	if cl.tape != nil {
 		if _, err := cl.tape.Write(b); err != nil {
-			logger.Default.Printf("error writing to tape: %s", err)
+			slog.Default().Error("error writing to tape", "error", err)
 		}
 	}
 }
@@ -248,7 +248,7 @@ func (cl *Client) ParseResponse(req any, r *http.Response) error {
 // if it receives another rate limit error, it returns slack.RateLimitedError
 // to let the caller handle it.
 func do(ctx context.Context, cl *http.Client, req *http.Request) (*http.Response, error) {
-	lg := logger.FromContext(ctx)
+	lg := slog.Default()
 	req.Header.Set("Accept-Language", "en-NZ,en-AU;q=0.9,en;q=0.8")
 	req.Header.Set("User-Agent", slackauth.DefaultUserAgent)
 
@@ -261,7 +261,7 @@ func do(ctx context.Context, cl *http.Client, req *http.Request) (*http.Response
 		if err != nil {
 			return nil, err
 		}
-		lg.Debugf("got rate limited, waiting %s", wait)
+		lg.Debug("got rate limited, waiting", "delay", wait)
 
 		time.Sleep(wait)
 		resp, err = cl.Do(req)
@@ -270,7 +270,7 @@ func do(ctx context.Context, cl *http.Client, req *http.Request) (*http.Response
 		}
 		// if we are still rate limited, then we are in trouble
 		if resp.StatusCode == http.StatusTooManyRequests {
-			lg.Debug("edge.do: did my best, but still rate limited, giving up, not my problem")
+			lg.DebugContext(ctx, "edge.do: did my best, but still rate limited, giving up, not my problem")
 			wait, err = parseRetryAfter(resp)
 			if err != nil {
 				return nil, err
diff --git a/internal/edge/search.go b/internal/edge/search.go
index ef986be6..4d944f74 100644
--- a/internal/edge/search.go
+++ b/internal/edge/search.go
@@ -4,11 +4,11 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
+	"log/slog"
 	"runtime/trace"
 
 	"github.com/google/uuid"
 	"github.com/rusq/slack"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 // search.* API
@@ -87,9 +87,10 @@ const (
 func (cl *Client) SearchChannels(ctx context.Context, query string) ([]slack.Channel, error) {
 	ctx, task := trace.NewTask(ctx, "SearchChannels")
 	defer task.End()
+	lg := slog.With(ctx, "in", "SearchChannels", "query", query)
+
 	trace.Logf(ctx, "params", "query=%q", query)
 
-	lg := logger.FromContext(ctx)
 	clientReq, err := uuid.NewRandom()
 	if err != nil {
 		return nil, err
@@ -151,12 +152,13 @@ func (cl *Client) SearchChannels(ctx context.Context, query string) ([]slack.Cha
 			lg.Debug("no more channels")
 			break
 		}
-		lg.Debugf("next_cursor=%q", sr.Pagination.NextCursor)
+		lg.DebugContext(ctx, "pagination", "next_cursor", sr.Pagination.NextCursor)
 		form.Cursor = sr.Pagination.NextCursor
 		if err := lim.Wait(ctx); err != nil {
 			return nil, err
 		}
 	}
 	trace.Logf(ctx, "info", "channels found=%d", len(cc))
+	lg.DebugContext(ctx, "channels", "count", len(cc))
 	return cc, nil
 }
diff --git a/internal/network/network.go b/internal/network/network.go
index d2c1f68a..9e0dadd5 100644
--- a/internal/network/network.go
+++ b/internal/network/network.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log/slog"
 	"net"
 	"net/http"
 	"runtime/trace"
@@ -12,8 +13,6 @@ import (
 
 	"github.com/rusq/slack"
 	"golang.org/x/time/rate"
-
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 // defNumAttempts is the default number of retry attempts.
@@ -63,6 +62,7 @@ func WithRetry(ctx context.Context, lim *rate.Limiter, maxAttempts int, fn func(
 	if maxAttempts == 0 {
 		maxAttempts = defNumAttempts
 	}
+	lg := slog.With("maxAttempts", maxAttempts)
 
 	var lastErr error
 	for attempt := 0; attempt < maxAttempts; attempt++ {
@@ -82,7 +82,7 @@ func WithRetry(ctx context.Context, lim *rate.Limiter, maxAttempts int, fn func(
 		}
 		lastErr = cbErr
 
-		tracelogf(ctx, "error", "WithRetry: %[1]s (%[1]T) after %[2]d attempts", cbErr, attempt+1)
+		lg.ErrorContext(ctx, "WithRetry", "error", cbErr, "attempt", attempt+1)
 		var (
 			rle *slack.RateLimitedError
 			sce slack.StatusCodeError
@@ -90,6 +90,7 @@ func WithRetry(ctx context.Context, lim *rate.Limiter, maxAttempts int, fn func(
 		)
 		switch {
 		case errors.As(cbErr, &rle):
+			slog.InfoContext(ctx, "got rate limited, sleeping", "retry_after_sec", rle.RetryAfter, "error", cbErr)
 			tracelogf(ctx, "info", "got rate limited, sleeping %s (%s)", rle.RetryAfter, cbErr)
 			time.Sleep(rle.RetryAfter)
 			continue
@@ -97,6 +98,7 @@ func WithRetry(ctx context.Context, lim *rate.Limiter, maxAttempts int, fn func(
 			if isRecoverable(sce.Code) {
 				// possibly transient error
 				delay := waitFn(attempt)
+				slog.WarnContext(ctx, "got server error, sleeping", "status_code", sce.Code, "error", cbErr, "delay", delay.String())
 				tracelogf(ctx, "info", "got server error %d, sleeping %s (%s)", sce.Code, delay, cbErr)
 				time.Sleep(delay)
 				continue
@@ -105,6 +107,7 @@ func WithRetry(ctx context.Context, lim *rate.Limiter, maxAttempts int, fn func(
 			if ne.Op == "read" || ne.Op == "write" {
 				// possibly transient error
 				delay := netWaitFn(attempt)
+				slog.WarnContext(ctx, "got network error, sleeping", "op", ne.Op, "error", cbErr, "delay", delay.String())
 				tracelogf(ctx, "info", "got network error %s on %q, sleeping %s", cbErr, ne.Op, delay)
 				time.Sleep(delay)
 				continue
@@ -144,12 +147,10 @@ func expWait(attempt int) time.Duration {
 	return delay
 }
 
-func tracelogf(ctx context.Context, category string, fmt string, a ...any) {
+func tracelogf(ctx context.Context, category string, format string, a ...any) {
 	mu.RLock()
 	defer mu.RUnlock()
-	lg := logger.FromContext(ctx)
-	trace.Logf(ctx, category, fmt, a...)
-	lg.Debugf(fmt, a...)
+	trace.Logf(ctx, category, format, a...)
 }
 
 // SetMaxAllowedWaitTime sets the maximum time to wait for a transient error.
diff --git a/internal/structures/files/dl/base.go b/internal/structures/files/dl/base.go
index 9c4d3437..f97651ac 100644
--- a/internal/structures/files/dl/base.go
+++ b/internal/structures/files/dl/base.go
@@ -2,8 +2,7 @@ package dl
 
 import (
 	"context"
-
-	"github.com/rusq/slackdump/v3/logger"
+	"log/slog"
 )
 
 const entFiles = "files"
@@ -11,7 +10,7 @@ const entFiles = "files"
 type base struct {
 	dl    exportDownloader
 	token string // token is the token that will be appended to each file URL.
-	l     logger.Interface
+	l     *slog.Logger
 }
 
 func (bd *base) Start(ctx context.Context) {
diff --git a/internal/structures/files/dl/mattermost.go b/internal/structures/files/dl/mattermost.go
index 984b8484..f593253d 100644
--- a/internal/structures/files/dl/mattermost.go
+++ b/internal/structures/files/dl/mattermost.go
@@ -4,6 +4,7 @@ package dl
 
 import (
 	"errors"
+	"log/slog"
 	"path/filepath"
 
 	"github.com/rusq/slack"
@@ -12,7 +13,6 @@ import (
 	"github.com/rusq/slackdump/v3"
 	"github.com/rusq/slackdump/v3/downloader"
 	"github.com/rusq/slackdump/v3/internal/structures/files"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 )
 
@@ -23,7 +23,7 @@ type Mattermost struct {
 // NewMattermost returns the dl, that downloads the files into
 // the __uploads directory, so that it could be transformed into bulk import
 // by mmetl and imported into mattermost with mmctl import bulk.
-func NewMattermost(fs fsadapter.FS, cl *slack.Client, l logger.Interface, token string) *Mattermost {
+func NewMattermost(fs fsadapter.FS, cl *slack.Client, l *slog.Logger, token string) *Mattermost {
 	return &Mattermost{
 		base: base{
 			l:     l,
diff --git a/internal/structures/files/dl/standard.go b/internal/structures/files/dl/standard.go
index 637b4383..4c1b6024 100644
--- a/internal/structures/files/dl/standard.go
+++ b/internal/structures/files/dl/standard.go
@@ -4,6 +4,7 @@ package dl
 
 import (
 	"errors"
+	"log/slog"
 	"path"
 	"path/filepath"
 
@@ -13,7 +14,6 @@ import (
 	"github.com/rusq/slackdump/v3"
 	"github.com/rusq/slackdump/v3/downloader"
 	"github.com/rusq/slackdump/v3/internal/structures/files"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 )
 
@@ -23,7 +23,7 @@ type Std struct {
 
 // NewStd returns standard dl, which downloads files into
 // "channel_id/attachments" directory.
-func NewStd(fs fsadapter.FS, cl *slack.Client, l logger.Interface, token string) *Std {
+func NewStd(fs fsadapter.FS, cl *slack.Client, l *slog.Logger, token string) *Std {
 	return &Std{
 		base: base{
 			dl:    downloader.NewV1(cl, fs, downloader.LoggerV1(l)),
@@ -50,7 +50,7 @@ func (d *Std) ProcessFunc(channelName string) slackdump.ProcessFunc {
 			if err != nil {
 				return err
 			}
-			d.l.Debugf("submitted for download: %s", file.Name)
+			d.l.Debug("submitted for download", "filename", file.Name)
 			total++
 			if d.token != "" {
 				if err := files.Update(msg, addr, files.UpdateTokenFn(d.token)); err != nil {
diff --git a/internal/viewer/handlers.go b/internal/viewer/handlers.go
index 8d52dc55..42f42556 100644
--- a/internal/viewer/handlers.go
+++ b/internal/viewer/handlers.go
@@ -16,7 +16,7 @@ import (
 func (v *Viewer) indexHandler(w http.ResponseWriter, r *http.Request) {
 	page := v.view()
 	if err := v.tmpl.ExecuteTemplate(w, "index.html", page); err != nil {
-		v.lg.Printf("error: %v", err)
+		v.lg.ErrorContext(r.Context(), "indexHandler", "error", err)
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 	}
 }
@@ -53,26 +53,28 @@ func (v *Viewer) newFileHandler(fn func(w http.ResponseWriter, r *http.Request,
 }
 
 func (v *Viewer) channelHandler(w http.ResponseWriter, r *http.Request, id string) {
+	ctx := r.Context()
+	lg := v.lg.With("in", "channelHandler", "channel", id)
 	mm, err := v.src.AllMessages(id)
 	if err != nil {
 		if errors.Is(err, fs.ErrNotExist) {
 			http.NotFound(w, r)
 			return
 		}
-		v.lg.Printf("%s: error: %v", id, err)
+		lg.ErrorContext(ctx, "AllMessages", "error", err)
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
 	if len(mm) > 0 {
 		first, err := fasttime.TS2int(mm[0].Timestamp)
 		if err != nil {
-			v.lg.Printf("error: %v", err)
+			lg.ErrorContext(ctx, "TS2int", "idx", 0, "error", err)
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
 		last, err := fasttime.TS2int(mm[len(mm)-1].Timestamp)
 		if err != nil {
-			v.lg.Printf("error: %v", err)
+			lg.ErrorContext(ctx, "TS2int", "idx", -1, "error", err)
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
@@ -81,11 +83,11 @@ func (v *Viewer) channelHandler(w http.ResponseWriter, r *http.Request, id strin
 		}
 	}
 
-	v.lg.Debugf("conversation: %s, got %d messages", id, len(mm))
+	lg.DebugContext(ctx, "conversation", "id", id, "message_count", len(mm))
 
 	ci, err := v.src.ChannelInfo(id)
 	if err != nil {
-		v.lg.Printf("error: %v", err)
+		lg.ErrorContext(ctx, "src.ChannelInfo", "error", err)
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
@@ -99,7 +101,7 @@ func (v *Viewer) channelHandler(w http.ResponseWriter, r *http.Request, id strin
 		template = "hx_conversation"
 	}
 	if err := v.tmpl.ExecuteTemplate(w, template, page); err != nil {
-		v.lg.Printf("error: %v", err)
+		lg.ErrorContext(ctx, "ExecuteTemplate", "error", err)
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 	}
 
@@ -115,18 +117,20 @@ func (v *Viewer) threadHandler(w http.ResponseWriter, r *http.Request, id string
 		http.NotFound(w, r)
 		return
 	}
+	ctx := r.Context()
+	lg := v.lg.With("in", "threadHandler", "channel", id, "thread", ts)
 	mm, err := v.src.AllThreadMessages(id, ts)
 	if err != nil {
-		v.lg.Printf("%s: error: %v", id, err)
+		lg.ErrorContext(ctx, "AllThreadMessages", "error", err)
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
 
-	v.lg.Debugf("conversation: %s, thread: %s, got %d messages", id, ts, len(mm))
+	lg.DebugContext(ctx, "mm_count", len(mm))
 
 	ci, err := v.src.ChannelInfo(id)
 	if err != nil {
-		v.lg.Printf("error: %v", err)
+		lg.ErrorContext(ctx, "error", err)
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
@@ -146,13 +150,13 @@ func (v *Viewer) threadHandler(w http.ResponseWriter, r *http.Request, id string
 		// so we need to fetch them.
 		msg, err := v.src.AllMessages(id)
 		if err != nil {
-			v.lg.Printf("error: %v", err)
+			lg.ErrorContext(ctx, "AllMessages", "error", err, "template", template)
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 		}
 		page.Messages = msg
 	}
 	if err := v.tmpl.ExecuteTemplate(w, template, page); err != nil {
-		v.lg.Printf("error: %v", err)
+		lg.ErrorContext(ctx, "ExecuteTemplate", "error", err, "template", template)
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 	}
 }
@@ -161,11 +165,13 @@ func (v *Viewer) fileHandler(w http.ResponseWriter, r *http.Request) {
 	var (
 		id       = r.PathValue("id")
 		filename = r.PathValue("filename")
+		ctx      = r.Context()
 	)
 	if id == "" || filename == "" {
 		http.NotFound(w, r)
 		return
 	}
+	lg := v.lg.With("in", "fileHandler", "id", id, "filename", filename)
 	fs := v.src.FS()
 	path, err := v.src.File(id, filename)
 	if err != nil {
@@ -173,7 +179,7 @@ func (v *Viewer) fileHandler(w http.ResponseWriter, r *http.Request) {
 			http.NotFound(w, r)
 			return
 		}
-		v.lg.Printf("error: %v", err)
+		lg.ErrorContext(ctx, "File", "error", err)
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
@@ -187,6 +193,8 @@ func (v *Viewer) userHandler(w http.ResponseWriter, r *http.Request) {
 		http.NotFound(w, r)
 		return
 	}
+	ctx := r.Context()
+	lg := v.lg.With("in", "userHandler", "user_id", uid)
 	u, found := v.um[uid]
 	if !found {
 		http.NotFound(w, r)
@@ -195,7 +203,7 @@ func (v *Viewer) userHandler(w http.ResponseWriter, r *http.Request) {
 	spew.Dump(u)
 
 	if err := v.tmpl.ExecuteTemplate(w, "hx_user", u); err != nil {
-		v.lg.Printf("error: %v", err)
+		lg.ErrorContext(ctx, "ExecuteTemplate", "error", err)
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 	}
 }
diff --git a/internal/viewer/source/export.go b/internal/viewer/source/export.go
index 4ff68c4c..c95ec0fc 100644
--- a/internal/viewer/source/export.go
+++ b/internal/viewer/source/export.go
@@ -3,12 +3,12 @@ package source
 import (
 	"fmt"
 	"io/fs"
+	"log/slog"
 	"path"
 
 	"github.com/rusq/slack"
 	"github.com/rusq/slackdump/v3/export"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 // Export implements viewer.Sourcer for the zip file Slack export format.
@@ -119,7 +119,7 @@ func (e *Export) walkChannelMessages(channelID string, fn func(m *slack.Message)
 		}
 		for i, m := range em {
 			if m.Msg == nil {
-				logger.Default.Debugf("skipping an empty message in %s at index %d", pth, i)
+				slog.Default().Debug("skipping an empty message", "pth", pth, "index", i)
 				continue
 			}
 			if err := fn(&slack.Message{Msg: *m.Msg}); err != nil {
diff --git a/internal/viewer/template_test.go b/internal/viewer/template_test.go
index ce04eea3..b7777c01 100644
--- a/internal/viewer/template_test.go
+++ b/internal/viewer/template_test.go
@@ -2,6 +2,7 @@ package viewer
 
 import (
 	"html/template"
+	"log/slog"
 	"net/http"
 	"testing"
 
@@ -9,7 +10,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/fixtures"
 	st "github.com/rusq/slackdump/v3/internal/structures"
 	"github.com/rusq/slackdump/v3/internal/viewer/renderer"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 func TestViewer_username(t *testing.T) {
@@ -19,7 +19,7 @@ func TestViewer_username(t *testing.T) {
 		rtr  Sourcer
 		tmpl *template.Template
 		srv  *http.Server
-		lg   logger.Interface
+		lg   *slog.Logger
 		r    renderer.Renderer
 	}
 	type args struct {
@@ -35,6 +35,7 @@ func TestViewer_username(t *testing.T) {
 			"bot message",
 			fields{
 				um: st.UserIndex{},
+				lg: slog.Default(),
 			},
 			args{
 				m: fixtures.Load[*slack.Message](fixtures.AppMessageJSON),
diff --git a/internal/viewer/viewer.go b/internal/viewer/viewer.go
index 411fa388..d5000bdc 100644
--- a/internal/viewer/viewer.go
+++ b/internal/viewer/viewer.go
@@ -17,7 +17,6 @@ import (
 	st "github.com/rusq/slackdump/v3/internal/structures"
 	"github.com/rusq/slackdump/v3/internal/viewer/renderer"
 	"github.com/rusq/slackdump/v3/internal/viewer/source"
-	"github.com/rusq/slackdump/v3/logger"
 )
 
 var debug = os.Getenv("DEBUG") != ""
@@ -38,7 +37,7 @@ type Viewer struct {
 
 	// handles
 	srv *http.Server
-	lg  logger.Interface
+	lg  *slog.Logger
 	r   renderer.Renderer
 }
 
@@ -101,7 +100,7 @@ func New(ctx context.Context, addr string, r Sourcer) (*Viewer, error) {
 		src: r,
 		ch:  cc,
 		um:  um,
-		lg:  logger.FromContext(ctx),
+		lg:  slog.Default(),
 	}
 	// postinit
 	initTemplates(v)
@@ -143,7 +142,7 @@ func (v *Viewer) Close() error {
 	}
 	v.lg.Debug("server closed")
 	if ee != nil {
-		v.lg.Printf("errors: %v", ee)
+		v.lg.Error("close", "errors", ee)
 	}
 	return ee
 }
diff --git a/logger/logger.go b/logger/logger.go
deleted file mode 100644
index f600c747..00000000
--- a/logger/logger.go
+++ /dev/null
@@ -1,60 +0,0 @@
-package logger
-
-import (
-	"context"
-	"log"
-	"os"
-
-	"github.com/rusq/dlog"
-)
-
-// Interface is the interface for a logger.
-type Interface interface {
-	Debug(...any)
-	Debugf(fmt string, a ...any)
-	Debugln(...any)
-	Print(...any)
-	Printf(fmt string, a ...any)
-	Println(...any)
-	IsDebug() bool
-}
-
-// Default is the default logger.  It logs to stderr and debug logging can be
-// enabled by setting the DEBUG environment variable to 1.  For example:
-//
-//	DEBUG=1 slackdump
-var Default = dlog.New(log.Default().Writer(), "", log.LstdFlags, os.Getenv("DEBUG") == "1")
-
-// Silent is a logger that does not log anything.
-var Silent = silent{}
-
-// Silent is a logger that does not log anything.
-type silent struct{}
-
-func (s silent) Debug(...any)                {}
-func (s silent) Debugf(fmt string, a ...any) {}
-func (s silent) Debugln(...any)              {}
-func (s silent) Print(...any)                {}
-func (s silent) Printf(fmt string, a ...any) {}
-func (s silent) Println(...any)              {}
-func (s silent) IsDebug() bool               { return false }
-
-type logCtx uint8
-
-const (
-	logCtxKey logCtx = iota
-)
-
-// NewContext returns a new context with the logger.
-func NewContext(ctx context.Context, l Interface) context.Context {
-	return context.WithValue(ctx, logCtxKey, l)
-}
-
-// FromContext returns the logger from the context.  If no logger is found,
-// the Default logger is returned.
-func FromContext(ctx context.Context) Interface {
-	if l, ok := ctx.Value(logCtxKey).(Interface); ok {
-		return l
-	}
-	return Default
-}
diff --git a/logger/logger_test.go b/logger/logger_test.go
deleted file mode 100644
index fc5f53c8..00000000
--- a/logger/logger_test.go
+++ /dev/null
@@ -1,16 +0,0 @@
-package logger
-
-import "testing"
-
-func BenchmarkSlientPrintf(b *testing.B) {
-	var l = Silent
-	for i := 0; i < b.N; i++ {
-		l.Printf("hello world, %s, %d", "foo", i)
-	}
-	// This benchmark compares the performance of the Silent logger when
-	// using io.Discard, and when using a no-op function.
-	// io.Discard: BenchmarkSlientPrintf-16    	93075956	        12.92 ns/op	       8 B/op	       0 allocs/op
-	// no-op func: BenchmarkSlientPrintf-16    	1000000000	         0.2364 ns/op	       0 B/op	       0 allocs/op
-	//
-	// Oh, look! We have an WINNER.  The no-op function wins, no surprises.
-}
diff --git a/messages.go b/messages.go
index abb7624e..3e12dd05 100644
--- a/messages.go
+++ b/messages.go
@@ -141,14 +141,14 @@ func (s *Session) dumpChannel(ctx context.Context, channelID string, oldest, lat
 
 		messages = append(messages, chunk...)
 
-		s.log.Printf("messages request #%5d, fetched: %4d (%s), total: %8d (speed: %6.2f/sec, avg: %6.2f/sec)\n",
-			i, len(resp.Messages), results, len(messages),
-			float64(len(resp.Messages))/float64(time.Since(reqStart).Seconds()),
-			float64(len(messages))/float64(time.Since(fetchStart).Seconds()),
+		s.log.InfoContext(ctx, "messages", "request", i, "fetched", len(resp.Messages), "total", len(messages),
+			"process results", results,
+			"speed", float64(len(resp.Messages))/time.Since(reqStart).Seconds(),
+			"avg", float64(len(messages))/time.Since(fetchStart).Seconds(),
 		)
 
 		if !resp.HasMore {
-			s.log.Printf("messages fetch complete, total: %d", len(messages))
+			s.log.InfoContext(ctx, "messages fetch complete", "total", len(messages))
 			break
 		}
 
diff --git a/messages_test.go b/messages_test.go
index eb13e631..7071f7b5 100644
--- a/messages_test.go
+++ b/messages_test.go
@@ -3,6 +3,7 @@ package slackdump
 import (
 	"context"
 	"errors"
+	"log/slog"
 	"reflect"
 	"testing"
 
@@ -13,7 +14,6 @@ import (
 
 	"github.com/rusq/slackdump/v3/internal/fixtures"
 	"github.com/rusq/slackdump/v3/internal/network"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 )
 
@@ -219,7 +219,7 @@ func TestSession_DumpMessages(t *testing.T) {
 			sd := &Session{
 				client: mc,
 				cfg:    tt.fields.config,
-				log:    logger.Silent,
+				log:    slog.Default(),
 			}
 			got, err := sd.DumpAll(tt.args.ctx, tt.args.channelID)
 			if (err != nil) != tt.wantErr {
@@ -300,7 +300,7 @@ func TestSession_DumpAll(t *testing.T) {
 			sd := &Session{
 				client: mc,
 				cfg:    tt.fields.config,
-				log:    logger.Silent,
+				log:    slog.Default(),
 			}
 			got, err := sd.DumpAll(tt.args.ctx, tt.args.slackURL)
 			if (err != nil) != tt.wantErr {
diff --git a/slackdump.go b/slackdump.go
index 8a18926a..f9197196 100644
--- a/slackdump.go
+++ b/slackdump.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"log/slog"
 	"runtime/trace"
 	"time"
 
@@ -16,7 +17,6 @@ import (
 	"github.com/rusq/slackdump/v3/auth"
 	"github.com/rusq/slackdump/v3/internal/edge"
 	"github.com/rusq/slackdump/v3/internal/network"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/stream"
 )
 
@@ -26,10 +26,10 @@ import (
 // Session stores basic session parameters.  Zero value is not usable, must be
 // initialised with New.
 type Session struct {
-	client clienter         // Slack client
-	uc     *usercache       // usercache contains the list of users.
-	fs     fsadapter.FS     // filesystem adapter
-	log    logger.Interface // logger
+	client clienter     // Slack client
+	uc     *usercache   // usercache contains the list of users.
+	fs     fsadapter.FS // filesystem adapter
+	log    *slog.Logger // logger
 
 	wspInfo *WorkspaceInfo // workspace info
 
@@ -103,7 +103,7 @@ func WithLimits(l network.Limits) Option {
 // given, the default logger is initialised with the filename specified in
 // Config.Logfile.  If the Config.Logfile is empty, the default logger writes
 // to STDERR.
-func WithLogger(l logger.Interface) Option {
+func WithLogger(l *slog.Logger) Option {
 	return func(s *Session) {
 		if l != nil {
 			s.log = l
@@ -154,7 +154,7 @@ func NewNoValidate(ctx context.Context, prov auth.Provider, opts ...Option) (*Se
 		cfg: defConfig,
 		uc:  new(usercache),
 
-		log: logger.Default,
+		log: slog.Default(),
 	}
 	for _, opt := range opts {
 		opt(sd)
diff --git a/slackdump_test.go b/slackdump_test.go
index 904b812d..04b8526c 100644
--- a/slackdump_test.go
+++ b/slackdump_test.go
@@ -3,6 +3,7 @@ package slackdump
 import (
 	"context"
 	"log"
+	"log/slog"
 	"math"
 	"net/http"
 	"os"
@@ -16,7 +17,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/edge"
 	"github.com/rusq/slackdump/v3/internal/mocks/mock_auth"
 	"github.com/rusq/slackdump/v3/internal/network"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/stretchr/testify/assert"
 	"go.uber.org/mock/gomock"
 )
@@ -213,7 +213,7 @@ func TestSession_initClient(t *testing.T) {
 
 		s := Session{
 			client: nil,
-			log:    logger.Default,
+			log:    slog.Default(),
 		}
 		err := s.initClient(context.Background(), mprov, false)
 		assert.NoError(t, err, "unexpected error")
@@ -232,7 +232,7 @@ func TestSession_initClient(t *testing.T) {
 
 		s := Session{
 			client: nil,
-			log:    logger.Default,
+			log:    slog.Default(),
 		}
 		err := s.initClient(context.Background(), mprov, false)
 		assert.NoError(t, err, "unexpected error")
@@ -250,7 +250,7 @@ func TestSession_initClient(t *testing.T) {
 
 		s := Session{
 			client: nil,
-			log:    logger.Default,
+			log:    slog.Default(),
 		}
 		err := s.initClient(context.Background(), mprov, true)
 		assert.NoError(t, err, "unexpected error")
diff --git a/stream/conversation.go b/stream/conversation.go
index ceea35cd..264c8e65 100644
--- a/stream/conversation.go
+++ b/stream/conversation.go
@@ -4,13 +4,13 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log/slog"
 	"runtime/trace"
 	"sync"
 
 	"github.com/rusq/slack"
 	"github.com/rusq/slackdump/v3/internal/network"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/processor"
 	"golang.org/x/sync/errgroup"
 )
@@ -18,9 +18,9 @@ import (
 // SyncConversations fetches the conversations from the link which can be a
 // channelID, channel URL, thread URL or a link in Slackdump format.
 func (cs *Stream) SyncConversations(ctx context.Context, proc processor.Conversations, link ...string) error {
-	lg := logger.FromContext(ctx)
+	lg := slog.With("links", link)
 	return cs.ConversationsCB(ctx, proc, link, func(sr Result) error {
-		lg.Debugf("stream: finished processing: %s", sr)
+		lg.DebugContext(ctx, "stream: finished processing", "result", sr)
 		return nil
 	})
 }
@@ -29,7 +29,7 @@ func (cs *Stream) ConversationsCB(ctx context.Context, proc processor.Conversati
 	ctx, task := trace.NewTask(ctx, "channelStream.Conversations")
 	defer task.End()
 
-	lg := logger.FromContext(ctx)
+	lg := slog.With("links", link)
 	cs.resultFn = append(cs.resultFn, cb)
 
 	linkC := make(chan string, 1)
@@ -38,7 +38,7 @@ func (cs *Stream) ConversationsCB(ctx context.Context, proc processor.Conversati
 		for _, l := range link {
 			linkC <- l
 		}
-		lg.Debugf("stream: sent %d links", len(link))
+		lg.DebugContext(ctx, "stream: sent link count", "len", len(link))
 	}()
 
 	if err := cs.Conversations(ctx, proc, linkC); err != nil {
@@ -172,7 +172,7 @@ func (cs *Stream) channel(ctx context.Context, id string, callback func(mm []sla
 	ctx, task := trace.NewTask(ctx, "channel")
 	defer task.End()
 
-	lg := logger.FromContext(ctx)
+	lg := slog.With("channel_id", id)
 
 	cursor := ""
 	for {
@@ -207,7 +207,7 @@ func (cs *Stream) channel(ctx context.Context, id string, callback func(mm []sla
 		}
 
 		if !resp.HasMore {
-			lg.Debugf("server reported channel %s done", id)
+			lg.DebugContext(ctx, "server reported channel done")
 			break
 		}
 		cursor = resp.ResponseMetaData.NextCursor
@@ -225,8 +225,8 @@ func (cs *Stream) thread(ctx context.Context, sl *structures.SlackLink, callback
 		return fmt.Errorf("not a thread: %s", sl)
 	}
 
-	lg := logger.FromContext(ctx)
-	lg.Debugf("- getting: %s", sl)
+	lg := slog.With("slack_link", sl.String())
+	lg.DebugContext(ctx, "- getting", sl)
 
 	var cursor string
 	for {
@@ -273,7 +273,7 @@ func (cs *Stream) thread(ctx context.Context, sl *structures.SlackLink, callback
 // sends the thread request on threadC.  It returns thread count in the mm and
 // error if any.
 func procChanMsg(ctx context.Context, proc processor.Conversations, threadC chan<- request, channel *slack.Channel, isLast bool, mm []slack.Message) (int, error) {
-	lg := logger.FromContext(ctx)
+	lg := slog.With("channel_id", channel.ID, "is_last", isLast, "msg_count", len(mm))
 
 	var trs = make([]request, 0, len(mm))
 	for i := range mm {
@@ -283,7 +283,7 @@ func procChanMsg(ctx context.Context, proc processor.Conversations, threadC chan
 		// start processing the channel and will have the initial reference
 		// count, if it needs it.
 		if mm[i].Msg.ThreadTimestamp != "" && mm[i].Msg.SubType != structures.SubTypeThreadBroadcast && mm[i].LatestReply != structures.LatestReplyNoReplies {
-			lg.Debugf("- message #%d/channel=%s,thread: id=%s, thread_ts=%s", i, channel.ID, mm[i].Timestamp, mm[i].Msg.ThreadTimestamp)
+			lg.DebugContext(ctx, "- message", "i", i, "thread", mm[i].Timestamp, "thread_ts", mm[i].Msg.ThreadTimestamp)
 			trs = append(trs, request{
 				sl: &structures.SlackLink{
 					Channel:  channel.ID,
diff --git a/stream/search.go b/stream/search.go
index 9d314037..7f1f28df 100644
--- a/stream/search.go
+++ b/stream/search.go
@@ -2,12 +2,12 @@ package stream
 
 import (
 	"context"
+	"log/slog"
 	"runtime/trace"
 	"sync"
 
 	"github.com/rusq/slack"
 	"github.com/rusq/slackdump/v3/internal/network"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/processor"
 	"golang.org/x/sync/errgroup"
 )
@@ -79,7 +79,7 @@ func (cs *Stream) searchmsg(ctx context.Context, query string, fn func(sm []slac
 	ctx, task := trace.NewTask(ctx, "searchMessages")
 	defer task.End()
 
-	lg := logger.FromContext(ctx)
+	lg := slog.With("query", query)
 
 	var p = slack.SearchParameters{
 		Sort:          "timestamp",
@@ -102,7 +102,7 @@ func (cs *Stream) searchmsg(ctx context.Context, query string, fn func(sm []slac
 			return err
 		}
 		if sm.NextCursor == "" {
-			lg.Debug("SearchMessages:  no more messages")
+			lg.DebugContext(ctx, "SearchMessages:  no more messages")
 			break
 		}
 		p.Cursor = sm.NextCursor
@@ -117,7 +117,7 @@ func (cs *Stream) SearchFiles(ctx context.Context, proc processor.FileSearcher,
 	ctx, task := trace.NewTask(ctx, "SearchFiles")
 	defer task.End()
 
-	lg := logger.FromContext(ctx)
+	lg := slog.With("query", query)
 
 	var p = slack.SearchParameters{
 		Sort:          "timestamp",
@@ -143,7 +143,7 @@ func (cs *Stream) SearchFiles(ctx context.Context, proc processor.FileSearcher,
 			return err
 		}
 		if sm.NextCursor == "" {
-			lg.Debug("SearchFiles:  no more messages")
+			lg.DebugContext(ctx, "SearchFiles:  no more messages")
 			break
 		}
 		p.Cursor = sm.NextCursor
diff --git a/thread.go b/thread.go
index a7c88082..422061e2 100644
--- a/thread.go
+++ b/thread.go
@@ -145,15 +145,10 @@ func (s *Session) dumpThread(
 			return nil, err
 		}
 
-		s.log.Printf("  thread request #%5d, fetched: %4d, total: %8d, process results: %s (speed: %6.2f/sec, avg: %6.2f/sec)\n",
-			i+1, len(msgs), len(thread),
-			prs,
-			float64(len(msgs))/time.Since(reqStart).Seconds(),
-			float64(len(thread))/time.Since(fetchStart).Seconds(),
-		)
+		s.log.InfoContext(ctx, "  thread", "request", i+1, "fetched", len(msgs), "total", len(thread), "process results", prs, "speed", float64(len(msgs))/time.Since(reqStart).Seconds(), "avg", float64(len(thread))/time.Since(fetchStart).Seconds())
 
 		if !hasmore {
-			s.log.Printf("  thread fetch complete, total: %d", len(thread))
+			s.log.InfoContext(ctx, "  thread fetch complete", "total", len(thread))
 			break
 		}
 		cursor = nextCursor
diff --git a/thread_test.go b/thread_test.go
index d37aef6c..487afa9a 100644
--- a/thread_test.go
+++ b/thread_test.go
@@ -2,6 +2,7 @@ package slackdump
 
 import (
 	"context"
+	"log/slog"
 	"testing"
 	"time"
 
@@ -14,7 +15,6 @@ import (
 
 	"github.com/rusq/slackdump/v3/internal/network"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 )
 
@@ -166,7 +166,7 @@ func TestSession_DumpThreadWithFiles(t *testing.T) {
 			sd := &Session{
 				client: mc,
 				cfg:    tt.fields.config,
-				log:    logger.Silent,
+				log:    slog.Default(),
 			}
 			got, err := sd.dumpThreadAsConversation(tt.args.ctx, structures.SlackLink{Channel: tt.args.channelID, ThreadTS: tt.args.threadTS}, tt.args.oldest, tt.args.latest)
 			if (err != nil) != tt.wantErr {
@@ -384,7 +384,7 @@ func TestSession_dumpThread(t *testing.T) {
 			sd := &Session{
 				client: mc,
 				cfg:    tt.fields.config,
-				log:    logger.Silent,
+				log:    slog.Default(),
 			}
 			got, err := sd.dumpThread(tt.args.ctx, tt.args.l, tt.args.channelID, tt.args.threadTS, tt.args.oldest, tt.args.latest)
 			if (err != nil) != tt.wantErr {
diff --git a/users_test.go b/users_test.go
index 1d726005..2d993c54 100644
--- a/users_test.go
+++ b/users_test.go
@@ -2,6 +2,7 @@ package slackdump
 
 import (
 	"context"
+	"log/slog"
 	"reflect"
 	"testing"
 	"time"
@@ -14,7 +15,6 @@ import (
 	"github.com/rusq/slackdump/v3/internal/fixtures"
 	"github.com/rusq/slackdump/v3/internal/network"
 	"github.com/rusq/slackdump/v3/internal/structures"
-	"github.com/rusq/slackdump/v3/logger"
 	"github.com/rusq/slackdump/v3/types"
 )
 
@@ -178,7 +178,7 @@ func TestSession_GetUsers(t *testing.T) {
 				wspInfo: &slack.AuthTestResponse{TeamID: testSuffix},
 				cfg:     tt.fields.config,
 				uc:      &tt.fields.usercache,
-				log:     logger.Silent,
+				log:     slog.Default(),
 			}
 			got, err := sd.GetUsers(tt.args.ctx)
 			if (err != nil) != tt.wantErr {