diff --git a/classes.php b/classes.php
index dbd1aea..047f8be 100644
--- a/classes.php
+++ b/classes.php
@@ -124,6 +124,20 @@ class ActionUrlencode extends AbstractAction
     }
 }
 
+class ActionSerialize extends AbstractAction
+{
+    public function setUp()
+    {
+        $this->setContainer( new TextareaContainer );
+        $this->setFormatter( new EchoFormatter );
+    }
+
+    public function decode()
+    {
+        return serialize( $this->value );
+    }
+}
+
 class ActionUnserialize extends AbstractAction
 {
     public function setUp()
diff --git a/index.php b/index.php
index b15c4db..a53dd93 100644
--- a/index.php
+++ b/index.php
@@ -38,6 +38,7 @@ if( 'POST' === $_SERVER['REQUEST_METHOD'] ) {
                 <option value="QuotedPrintableEncode" <?php echo selected($action_str, 'QuotedPrintableEncode'); ?>>quoted_printable_encode()</option>
                 <option value="Urlencode" <?php echo selected($action_str, 'Urlencode'); ?>>urlencode()</option>
                 <option value="Urldecode" <?php echo selected($action_str, 'Urldecode'); ?>>urldecode()</option>
+                <option value="Serialize" <?php echo selected($action_str, 'Serialize'); ?>>serialize()</option>
                 <option value="Unserialize" <?php echo selected($action_str, 'Unserialize'); ?>>unserialize()</option>
                 <option value="Base64Decode" <?php echo selected($action_str, 'Base64Decode'); ?>>base64_decode()</option>
                 <option value="Base64Encode" <?php echo selected($action_str, 'Base64Encode'); ?>>base64_encode()</option>