diff --git a/logutil/slogutil/defer_example_test.go b/logutil/slogutil/defer_example_test.go
index 8801de6..e1a5723 100644
--- a/logutil/slogutil/defer_example_test.go
+++ b/logutil/slogutil/defer_example_test.go
@@ -13,7 +13,7 @@ import (
 func ExampleCloseAndLog() {
 	ctx := context.Background()
 	l := slogutil.New(&slogutil.Config{
-		Verbose: true,
+		Level: slog.LevelDebug,
 	})
 
 	func() {
diff --git a/logutil/slogutil/legacy.go b/logutil/slogutil/legacy.go
index 9e56152..796ea89 100644
--- a/logutil/slogutil/legacy.go
+++ b/logutil/slogutil/legacy.go
@@ -157,6 +157,8 @@ type logFunction func(format string, args ...any)
 // returned.
 func logFuncForLevel(lvl slog.Level) (logFunc logFunction, warnStr string, err error) {
 	switch lvl {
+	case LevelTrace:
+		return aglog.Debug, "trace: ", nil
 	case slog.LevelDebug:
 		return aglog.Debug, "", nil
 	case slog.LevelInfo:
diff --git a/logutil/slogutil/slogutil.go b/logutil/slogutil/slogutil.go
index 576aa96..4b52008 100644
--- a/logutil/slogutil/slogutil.go
+++ b/logutil/slogutil/slogutil.go
@@ -29,11 +29,11 @@ type Config struct {
 	// If set, it must be valid.
 	Format Format
 
+	// Level is the minimum record level that will be logged.
+	Level slog.Level
+
 	// AddTimestamp, if true, adds a timestamp to every record.
 	AddTimestamp bool
-
-	// Verbose, if true, enables verbose logging.
-	Verbose bool
 }
 
 // New creates a slog logger with the given parameters.  If c is nil, the
@@ -49,11 +49,7 @@ func New(c *Config) (l *slog.Logger) {
 		}
 	}
 
-	lvl := slog.LevelInfo
-	if c.Verbose {
-		lvl = slog.LevelDebug
-	}
-
+	lvl := c.Level
 	format := cmp.Or(c.Format, FormatDefault)
 	output := cmp.Or[io.Writer](c.Output, os.Stdout)
 	if format == FormatDefault {
@@ -61,10 +57,7 @@ func New(c *Config) (l *slog.Logger) {
 		return newDefault(output, lvl, c.AddTimestamp)
 	}
 
-	var replaceAttr func(groups []string, a slog.Attr) (res slog.Attr)
-	if !c.AddTimestamp {
-		replaceAttr = RemoveTime
-	}
+	replaceAttr := newReplaceAttr(!c.AddTimestamp)
 
 	var h slog.Handler
 	switch format {
@@ -95,6 +88,8 @@ func New(c *Config) (l *slog.Logger) {
 }
 
 // newDefault returns a new default slog logger set up with the given options.
+//
+// TODO(d.kolyshev): Replace log level name for [LevelTrace].
 func newDefault(output io.Writer, lvl slog.Level, addTimestamp bool) (l *slog.Logger) {
 	h := NewLevelHandler(lvl, slog.Default().Handler())
 	log.SetOutput(output)
@@ -107,6 +102,38 @@ func newDefault(output io.Writer, lvl slog.Level, addTimestamp bool) (l *slog.Lo
 	return slog.New(h)
 }
 
+// newReplaceAttr is a function that returns [slog.HandlerOptions.ReplaceAttr]
+// function for provided parameters.
+func newReplaceAttr(removeTime bool) func(groups []string, a slog.Attr) (res slog.Attr) {
+	if !removeTime {
+		return ReplaceLevel
+	}
+
+	return func(groups []string, a slog.Attr) (res slog.Attr) {
+		return ReplaceLevel(groups, RemoveTime(groups, a))
+	}
+}
+
+// traceAttrValue is a [LevelTrace] value under the [slog.LevelKey] key.
+var traceAttrValue = slog.StringValue("TRACE")
+
+// ReplaceLevel is a function for [slog.HandlerOptions.ReplaceAttr] that adds
+// [LevelTrace] custom name for level attribute.
+func ReplaceLevel(groups []string, a slog.Attr) (res slog.Attr) {
+	if len(groups) > 0 {
+		return a
+	}
+
+	if a.Key == slog.LevelKey {
+		lvl := a.Value.Any().(slog.Level)
+		if lvl == LevelTrace {
+			a.Value = traceAttrValue
+		}
+	}
+
+	return a
+}
+
 // RemoveTime is a function for [slog.HandlerOptions.ReplaceAttr] that removes
 // the "time" attribute.
 func RemoveTime(groups []string, a slog.Attr) (res slog.Attr) {
diff --git a/logutil/slogutil/slogutil_example_test.go b/logutil/slogutil/slogutil_example_test.go
index a46f754..4f710f9 100644
--- a/logutil/slogutil/slogutil_example_test.go
+++ b/logutil/slogutil/slogutil_example_test.go
@@ -9,7 +9,7 @@ import (
 
 func ExampleNew_default() {
 	l := slogutil.New(&slogutil.Config{
-		Verbose: true,
+		Level: slog.LevelDebug,
 	})
 
 	l.Info("test info")
@@ -22,8 +22,8 @@ func ExampleNew_default() {
 
 func ExampleNew_json() {
 	l := slogutil.New(&slogutil.Config{
-		Format:  slogutil.FormatJSON,
-		Verbose: true,
+		Format: slogutil.FormatJSON,
+		Level:  slog.LevelDebug,
 	})
 
 	l.Info("test info")
@@ -41,8 +41,8 @@ func ExampleNew_json() {
 
 func ExampleNew_text() {
 	l := slogutil.New(&slogutil.Config{
-		Format:  slogutil.FormatText,
-		Verbose: true,
+		Format: slogutil.FormatText,
+		Level:  slog.LevelDebug,
 	})
 
 	l.Info("test info")
@@ -72,3 +72,19 @@ This is a very long text with many lines.`
 	// INFO my text line_num=2 line=""
 	// INFO my text line_num=3 line="This is a very long text with many lines."
 }
+
+func ExampleNew_trace() {
+	l := slogutil.New(&slogutil.Config{
+		Format: slogutil.FormatText,
+		Level:  slogutil.LevelTrace,
+	})
+
+	l.Log(context.Background(), slogutil.LevelTrace, "test trace")
+	l.Info("test info")
+	l.Debug("test debug")
+
+	// Output:
+	// level=TRACE msg="test trace"
+	// level=INFO msg="test info"
+	// level=DEBUG msg="test debug"
+}
diff --git a/logutil/slogutil/verbosity.go b/logutil/slogutil/verbosity.go
new file mode 100644
index 0000000..05ba4e2
--- /dev/null
+++ b/logutil/slogutil/verbosity.go
@@ -0,0 +1,31 @@
+package slogutil
+
+import (
+	"fmt"
+	"log/slog"
+
+	"github.com/AdguardTeam/golibs/errors"
+)
+
+// Acceptable [slog.Level] levels.
+const (
+	LevelTrace = slog.Level(-8)
+	LevelDebug = slog.LevelDebug
+	LevelInfo  = slog.LevelInfo
+	LevelWarn  = slog.LevelWarn
+	LevelError = slog.LevelError
+)
+
+// VerbosityToLevel returns log level for given verbosity.
+func VerbosityToLevel(l uint8) (lvl slog.Level, err error) {
+	switch l {
+	case 0:
+		return LevelInfo, nil
+	case 1:
+		return LevelDebug, nil
+	case 2:
+		return LevelTrace, nil
+	default:
+		return lvl, fmt.Errorf("%w: %d", errors.ErrBadEnumValue, l)
+	}
+}