SourceTag
← All docs

Installation

Install SourceTag on Squarespace

Add SourceTag’s tracking script to your Squarespace site through the built-in Code Injection settings. No third-party apps or extensions needed.

Step 1: Copy your script tag

In your SourceTag dashboard, go to your site’s detail page and copy the script tag. It looks like:

<script src="https://cdn.sourcetag.io/scripts/YOUR_SITE_ID/st.js"></script>

Step 2: Open Code Injection

  1. In your Squarespace dashboard, go to Settings
  2. Click Advanced
  3. Click Code Injection

Step 3: Paste the script tag

  1. In the Header section, paste the script tag you copied from SourceTag
  2. Click Save

The script will now load on every page of your Squarespace site.

Step 4: Publish

If your site is already live, the change takes effect straight away. If you’re working on an unpublished version, publish your site to make the script active.

Step 5: Test

Visit your live site with UTM parameters in the URL:

https://yoursite.com/?utm_source=test&utm_medium=cpc&utm_campaign=squarespace-test

Open your browser’s developer tools (F12 or Cmd+Option+I on Mac) and check:

  1. View page source or the Elements panel to confirm the script tag is in the <head>
  2. Application > Cookies to confirm a _sourcetag cookie has been created
  3. Submit a form on your site. Check the form notification in Squarespace. The submission should include hidden fields with attribution data like st_fc_channel and st_lc_channel.

Notes

  • The script works with Squarespace’s native form blocks. You’ll need to add hidden fields to your forms yourself - SourceTag only populates fields that already exist. See Add Hidden Fields for the field names.
  • If you’re embedding a third-party form (Typeform, HubSpot, etc.) on a Squarespace page, the script will detect those too via MutationObserver.
  • Browser cookies are limited to 7 days on Squarespace. There’s no server-side cookie workaround available for Squarespace sites. See Safari Cookies for more detail.
  • Code Injection is available on Squarespace Core plans and above. If you’re on a Basic plan, you’ll need to upgrade to access this feature.

Doesn't answer your question or need more help? Get in touch.