Publishing your Designer Extension

Once you've built and tested your Designer Extension, the next step is to get in in the hands of your eagerly awaiting users! This guide will walk you through the process of uploading, bundling, and publishing your extension.

Build Your Extension

Before you can publish your extension, you need to build it with the Webflow CLI. This process compiles your code into a format that can be executed by the browser.

If you've built your project using the webflow extension init command, you can build your code using npm:

npm run build

Otherwise, navigate to your project folder and use the following CLI command:

webflow extension bundle

These commands will create a file named, which contains the built version of your extension.


Working with Frameworks

For frameworks that generate browser-ready file structures (i.e. Next.js), build using the framework first. Then, process the output using webflow extension bundle. Consider adding this as a script in your package.json file.

Uploading and Publishing Your Extension

With your extension bundled, you're now ready to upload it. Here's how:

  1. Go to your Workspace settings. Click on the Integrations tab.
  2. Scroll down to the "App development" section.
  3. Locate your app and click on the "publish extension version" option.
  4. In the file dialog that appears, select the file that you created in the previous step.


The Extension size limit is 5MB

The bundle size limit is 5MBl If your extension is larger than 5MB you may encounter an error when trying to bundle it.

After uploading the file, you should see a success message indicating that your extension has been uploaded.

Submitting your Extension to the Marketplace


Heads up! The Workspace where you registered your app determines its "Author" and its icon in the Marketplace. For example, see Only Workspace Admins can modify these settings.

To share your extension on the Marketplace first, review

Once your extension is uploaded, Webflow will review it before it becomes publicly available. This process can take a few days, and you'll receive an email notification once your extension is live.

You can then share your app with others by directing them to its page in the Webflow Marketplace. Users can add your extension to their projects directly from this page.

Congratulations πŸŽ‰, you've now published a Webflow App with a Designer Extension! We can't wait to see what you'll create.