diff --git a/cmd/genconfig.go b/cmd/genconfig.go
new file mode 100644
index 0000000..0237275
--- /dev/null
+++ b/cmd/genconfig.go
@@ -0,0 +1,46 @@
+package main
+
+import (
+	"fmt"
+	"gcs-backup/pkg/config"
+	"log"
+	"os"
+
+	"git.trj.tw/golang/argparse"
+	confloader "git.trj.tw/golang/config-loader"
+	"gopkg.in/yaml.v2"
+)
+
+func main() {
+	fmt.Println("generate config file")
+
+	confPath := ""
+
+	parser := argparse.New()
+	parser.StringVar(&confPath, "", "o", "output", "config output path", &argparse.Option{Require: true})
+
+	if err := parser.Parse(os.Args); err != nil {
+		log.Fatal(err)
+	}
+
+	file, err := os.Create(confPath)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer file.Close()
+
+	conf := &config.Config{}
+
+	if err := confloader.Load(conf, nil); err != nil {
+		log.Fatal(err)
+	}
+
+	b, err := yaml.Marshal(conf)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if _, err := file.Write(b); err != nil {
+		log.Fatal(err)
+	}
+}