diff --git a/byteutil/byteutil.go b/byteutil/byteutil.go
index 1f68bcb69..dc2d50f19 100644
--- a/byteutil/byteutil.go
+++ b/byteutil/byteutil.go
@@ -2,9 +2,23 @@ package byteutil
 
 import (
 	"bytes"
+	"fmt"
+	"math/rand"
+	"strconv"
+	"time"
 	"unsafe"
 )
 
+// Random bytes generate
+func Random(length int) ([]byte, error) {
+	b := make([]byte, length)
+	// Note that err == nil only if we read len(b) bytes.
+	if _, err := rand.Read(b); err != nil {
+		return nil, err
+	}
+	return b, nil
+}
+
 // FirstLine from command output
 func FirstLine(bs []byte) []byte {
 	if i := bytes.IndexByte(bs, '\n'); i >= 0 {
@@ -29,7 +43,7 @@ func SafeString(bs []byte, err error) string {
 	return string(bs)
 }
 
-// String convert bytes to string
+// String unsafe convert bytes to string
 func String(b []byte) string {
 	return *(*string)(unsafe.Pointer(&b))
 }
@@ -38,3 +52,54 @@ func String(b []byte) string {
 func ToString(b []byte) string {
 	return *(*string)(unsafe.Pointer(&b))
 }
+
+// AppendAny append any value to byte slice
+func AppendAny(dst []byte, v any) []byte {
+	if v == nil {
+		return append(dst, "<nil>"...)
+	}
+
+	switch val := v.(type) {
+	case []byte:
+		dst = append(dst, val...)
+	case string:
+		dst = append(dst, val...)
+	case int:
+		dst = strconv.AppendInt(dst, int64(val), 10)
+	case int8:
+		dst = strconv.AppendInt(dst, int64(val), 10)
+	case int16:
+		dst = strconv.AppendInt(dst, int64(val), 10)
+	case int32:
+		dst = strconv.AppendInt(dst, int64(val), 10)
+	case int64:
+		dst = strconv.AppendInt(dst, val, 10)
+	case uint:
+		dst = strconv.AppendUint(dst, uint64(val), 10)
+	case uint8:
+		dst = strconv.AppendUint(dst, uint64(val), 10)
+	case uint16:
+		dst = strconv.AppendUint(dst, uint64(val), 10)
+	case uint32:
+		dst = strconv.AppendUint(dst, uint64(val), 10)
+	case uint64:
+		dst = strconv.AppendUint(dst, val, 10)
+	case float32:
+		dst = strconv.AppendFloat(dst, float64(val), 'f', -1, 32)
+	case float64:
+		dst = strconv.AppendFloat(dst, val, 'f', -1, 64)
+	case bool:
+		dst = strconv.AppendBool(dst, val)
+	case time.Time:
+		dst = val.AppendFormat(dst, time.RFC3339)
+	case time.Duration:
+		dst = strconv.AppendInt(dst, int64(val), 10)
+	case error:
+		dst = append(dst, val.Error()...)
+	case fmt.Stringer:
+		dst = append(dst, val.String()...)
+	default:
+		dst = append(dst, fmt.Sprint(v)...)
+	}
+	return dst
+}
diff --git a/byteutil/byteutil_test.go b/byteutil/byteutil_test.go
index a0efb169c..4d6b161aa 100644
--- a/byteutil/byteutil_test.go
+++ b/byteutil/byteutil_test.go
@@ -6,6 +6,7 @@ import (
 
 	"github.com/gookit/goutil/byteutil"
 	"github.com/gookit/goutil/testutil/assert"
+	"github.com/gookit/goutil/timex"
 )
 
 func TestFirstLine(t *testing.T) {
@@ -32,3 +33,11 @@ func TestMd5(t *testing.T) {
 	assert.NotEmpty(t, byteutil.Md5("abc"))
 	assert.NotEmpty(t, byteutil.Md5([]int{12, 34}))
 }
+
+func TestAppendAny(t *testing.T) {
+	assert.Eq(t, []byte("123"), byteutil.AppendAny(nil, 123))
+	assert.Eq(t, []byte("123"), byteutil.AppendAny([]byte{}, 123))
+	assert.Eq(t, []byte("123"), byteutil.AppendAny([]byte("1"), 23))
+	assert.Eq(t, []byte("1<nil>"), byteutil.AppendAny([]byte("1"), nil))
+	assert.Eq(t, "3600000000000", string(byteutil.AppendAny([]byte{}, timex.OneHour)))
+}
diff --git a/fmtutil/format_test.go b/fmtutil/format_test.go
index e78697946..18612a644 100644
--- a/fmtutil/format_test.go
+++ b/fmtutil/format_test.go
@@ -4,8 +4,10 @@ import (
 	"fmt"
 	"testing"
 
+	"github.com/gookit/goutil/errorx"
 	"github.com/gookit/goutil/fmtutil"
 	"github.com/gookit/goutil/testutil/assert"
+	"github.com/gookit/goutil/timex"
 )
 
 func TestDataSize(t *testing.T) {
@@ -65,6 +67,30 @@ func TestArgsWithSpaces(t *testing.T) {
 	assert.Eq(t, "", fmtutil.ArgsWithSpaces([]any{}))
 	assert.Eq(t, "abc", fmtutil.ArgsWithSpaces([]any{"abc"}))
 	assert.Eq(t, "23 abc", fmtutil.ArgsWithSpaces([]any{23, "abc"}))
+
+	tests := []struct {
+		args []any
+		want string
+	}{
+		{nil, ""},
+		{[]any{"a", "b", "c"}, "a b c"},
+		{[]any{"a", "b", "c", 1, 2, 3}, "a b c 1 2 3"},
+		{[]any{"a", 1, nil}, "a 1 <nil>"},
+		{[]any{12, int8(12), int16(12), int32(12), int64(12)}, "12 12 12 12 12"},
+		{[]any{uint(12), uint8(12), uint16(12), uint32(12), uint64(12)}, "12 12 12 12 12"},
+		{[]any{float32(12.12), 12.12}, "12.12 12.12"},
+		{[]any{true, false}, "true false"},
+		{[]any{[]byte("abc"), []byte("123")}, "abc 123"},
+		{[]any{timex.OneHour}, "3600000000000"},
+		{[]any{errorx.Raw("a error message")}, "a error message"},
+		{[]any{[]int{1, 2, 3}}, "[1 2 3]"},
+	}
+
+	for _, tt := range tests {
+		assert.Eq(t, tt.want, fmtutil.ArgsWithSpaces(tt.args))
+	}
+
+	assert.NotEmpty(t, fmtutil.ArgsWithSpaces([]any{timex.Now().T()}))
 }
 
 func TestStringsToInts(t *testing.T) {