diff --git a/server/open.go b/server/open.go
new file mode 100644
index 0000000..5666b5a
--- /dev/null
+++ b/server/open.go
@@ -0,0 +1,33 @@
+package server
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"os/exec"
+	"runtime"
+)
+
+var cli map[string]string
+var stderr bytes.Buffer
+
+func init() {
+	cli = map[string]string{
+		"windows": "start",
+		"darwin":  "open",
+		"linux":   "xdg-open",
+	}
+}
+
+func Open(url string) (io.Writer, error) {
+	if open, err := cli[runtime.GOOS]; !err {
+		return nil, errors.New("This operating system is not supported.")
+	} else {
+		cmd := exec.Command(open, url)
+		cmd.Stderr = &stderr
+		if err := cmd.Run(); err != nil {
+			return cmd.Stderr, err
+		}
+	}
+	return nil, nil
+}