diff --git a/znet/inject.go b/znet/inject.go
index 9ca58b2..f6bf4a6 100644
--- a/znet/inject.go
+++ b/znet/inject.go
@@ -40,6 +40,8 @@ func invokeHandler(c *Context, v []reflect.Value) (err error) {
 			c.render = &renderString{Format: vv}
 		case error:
 			err = vv
+		case Renderer:
+			c.render = vv
 		case []byte:
 			c.render = &renderByte{Data: vv}
 		case ApiData:
diff --git a/znet/inject_test.go b/znet/inject_test.go
index b432396..0e496e4 100644
--- a/znet/inject_test.go
+++ b/znet/inject_test.go
@@ -139,6 +139,37 @@ func TestInjectMiddleware(t *testing.T) {
 	tt.Equal("middleware", w.Body.String())
 }
 
+type customRenderer struct {
+	Text string
+	Err  error
+}
+
+func (c *customRenderer) Content(ctx *Context) (content []byte) {
+	if c.Err != nil {
+		ctx.SetStatus(500)
+		return []byte(c.Err.Error())
+	}
+	ctx.SetStatus(200)
+	return []byte(c.Text)
+}
+
+func TestCustomRenderer(t *testing.T) {
+	tt := zlsgo.NewTest(t)
+	r := newServer()
+
+	w := newRequest(r, "GET", "/TestCustomRenderer", "/TestCustomRenderer", func(c *Context) *customRenderer {
+		return &customRenderer{Text: "test custom renderer"}
+	})
+	tt.Equal(200, w.Code)
+	tt.Equal("test custom renderer", w.Body.String())
+
+	w = newRequest(r, "GET", "/TestCustomRendererError", "/TestCustomRendererError", func(c *Context) *customRenderer {
+		return &customRenderer{Err: errors.New("test custom renderer error")}
+	})
+	tt.Equal(500, w.Code)
+	tt.Equal("test custom renderer error", w.Body.String())
+}
+
 func BenchmarkInjectNo(b *testing.B) {
 	r := newServer()
 	path := "/BenchmarkInjectNo"
diff --git a/znet/render.go b/znet/render.go
index 9e7fb66..ada4c33 100644
--- a/znet/render.go
+++ b/znet/render.go
@@ -18,7 +18,7 @@ import (
 )
 
 type (
-	render interface {
+	Renderer interface {
 		Content(c *Context) (content []byte)
 	}
 	renderByte struct {
@@ -71,7 +71,7 @@ var (
 	ContentTypeJSON = "application/json; charset=utf-8"
 )
 
-func (c *Context) renderProcessing(code int32, r render) {
+func (c *Context) renderProcessing(code int32, r Renderer) {
 	// if c.stopHandle.Load() && c.prevData.Code.Load() != 0 {
 	// 	return
 	// }
diff --git a/znet/web.go b/znet/web.go
index 1b2fa4b..6e624b7 100644
--- a/znet/web.go
+++ b/znet/web.go
@@ -28,7 +28,7 @@ type (
 	// Context context
 	Context struct {
 		startTime     time.Time
-		render        render
+		render        Renderer
 		Writer        http.ResponseWriter
 		injector      zdi.Injector
 		stopHandle    *zutil.Bool