# Initialize a new React-based extension in a 'my-new-extension' folder
webflow extension init my-new-extension react
```

### `extension bundle`

Bundles your Designer Extension into a `bundle.zip` file for upload.

**Usage**

```bash
webflow extension bundle
```

### `extension serve`

Serves your Designer Extension on a local development server.

**Usage**

```bash
webflow extension serve [port]
```

**Arguments**

| Argument | Description                       | Default |
| -------- | --------------------------------- | ------- |
| `port`   | The port to serve the project on. | `1337`  |