diff --git a/cmd/cmd_config.go b/cmd/cmd_config.go
index adea138..0209776 100644
--- a/cmd/cmd_config.go
+++ b/cmd/cmd_config.go
@@ -7,6 +7,8 @@ import (
 	"path/filepath"
 
 	"github.com/hiddify/hiddify-core/config"
+	pb "github.com/hiddify/hiddify-core/hiddifyrpc"
+	v2 "github.com/hiddify/hiddify-core/v2"
 	"github.com/sagernet/sing-box/experimental/libbox"
 	"github.com/sagernet/sing-box/log"
 	"github.com/sagernet/sing-box/option"
@@ -32,6 +34,19 @@ var commandBuild = &cobra.Command{
 		}
 	},
 }
+var generateConfig = &cobra.Command{
+	Use:   "gen",
+	Short: "gen configuration",
+	Run: func(cmd *cobra.Command, args []string) {
+		conf, err := v2.GenerateConfig(&pb.GenerateConfigRequest{
+			Path: args[0],
+		})
+		if err != nil {
+			log.Fatal(err)
+		}
+		log.Debug(string(conf.ConfigContent))
+	},
+}
 
 var commandCheck = &cobra.Command{
 	Use:   "check",
@@ -49,6 +64,7 @@ func init() {
 	addHConfigFlags(commandBuild)
 
 	mainCommand.AddCommand(commandBuild)
+	mainCommand.AddCommand(generateConfig)
 
 }
 
diff --git a/config/parser.go b/config/parser.go
index 292c072..d504054 100644
--- a/config/parser.go
+++ b/config/parser.go
@@ -57,6 +57,7 @@ func ParseConfigContent(contentstr string, debug bool, configOpt *ConfigOptions,
 		}
 
 		newContent, _ := json.MarshalIndent(jsonObj, "", "  ")
+
 		return patchConfig(newContent, "SingboxParser", configOpt)
 	}
 
@@ -113,6 +114,7 @@ func patchConfig(content []byte, name string, configOpt *ConfigOptions) ([]byte,
 	}
 
 	content, _ = json.MarshalIndent(options, "", "  ")
+
 	fmt.Printf("%s\n", content)
 	return validateResult(content, name)
 }
diff --git a/custom/custom.go b/custom/custom.go
index 07fef74..e1ce161 100644
--- a/custom/custom.go
+++ b/custom/custom.go
@@ -56,10 +56,15 @@ func changeConfigOptions(configOptionsJson *C.char) (CErr *C.char) {
 
 //export generateConfig
 func generateConfig(path *C.char) (res *C.char) {
-	_, err := v2.GenerateConfig(&pb.GenerateConfigRequest{
+	conf, err := v2.GenerateConfig(&pb.GenerateConfigRequest{
 		Path: C.GoString(path),
 	})
-	return emptyOrErrorC(err)
+	if err != nil {
+		return emptyOrErrorC(err)
+	}
+	fmt.Printf("Config: %+v\n", conf)
+	fmt.Printf("ConfigContent: %+v\n", conf.ConfigContent)
+	return C.CString(conf.ConfigContent)
 }
 
 //export start
diff --git a/v2/custom.go b/v2/custom.go
index 6598717..a41d1cd 100644
--- a/v2/custom.go
+++ b/v2/custom.go
@@ -229,7 +229,9 @@ func GenerateConfig(in *pb.GenerateConfigRequest) (*pb.GenerateConfigResponse, e
 		Log(pb.LogLevel_FATAL, pb.LogType_CONFIG, err.Error())
 		StopAndAlert(pb.MessageType_UNEXPECTED_ERROR, err.Error())
 	})
-
+	if configOptions == nil {
+		configOptions = config.DefaultConfigOptions()
+	}
 	config, err := generateConfigFromFile(in.Path, *configOptions)
 	if err != nil {
 		return nil, err