ConvertKit Form GTM Event Listener

ConvertKit

Overview

ConvertKit is an email marketing platform popular with creators and bloggers. Its embedded subscription forms use data-sv-form and data-uid HTML attributes. This listener uses a document-level submit event listener to detect ConvertKit form submissions and push them to the dataLayer.

Event fired: converkitform.submit Variables: convertKitFormId, convertkitUserId

Why Use This Listener

ConvertKit forms do not natively push to the dataLayer. Without this listener, email subscriber sign-ups are invisible to GTM, meaning you can't fire Google Ads or Meta pixels on newsletter sign-ups, or track them in GA4.

Common Use Cases

• Track newsletter subscriber sign-ups as GA4 conversions
• Fire Google Ads RLSA audiences on ConvertKit form submitters
• Measure which content pieces drive the most sign-ups (via page URL + form ID)
• Connect sign-up events to downstream revenue in GA4

Installation

<!-- GTM Custom HTML Tag: ConvertKit Form Listener -->
<script>
(function() {
  document.addEventListener('submit', function(a) {
    if (a.target.getAttribute('data-sv-form')) {
      window.dataLayer = window.dataLayer || [];
      window.dataLayer.push({
        'event': 'converkitform.submit',
        'convertKitFormId': a.target.getAttribute('data-sv-form'),
        'convertkitUserId': a.target.getAttribute('data-uid')
      });
    }
  }, true);
})();
</script>

Fire on: All Pages (Pageview). Uses capture phase (true as third argument) for reliable detection.

Data Layer Output

{
  "event": "converkitform.submit",
  "convertKitFormId": "1234567",
  "convertkitUserId": "abcdef12"
}

Trigger Configuration

Note: GTM event names with dots are supported, use the exact string converkitform.submit.

Variables to Capture

GA4 Mapping

Debugging

Best Practices

1. Always capture convertKitFormId, you may have multiple CK forms on different pages
2. Use GA4's sign_up event (not generate_lead) for newsletter subscriptions, aligns with GA4 taxonomy
3. Pass the Page URL as a parameter to identify which content drives sign-ups

Related Listeners

• Klaviyo
• Mailchimp for WordPress
• Drip Form
• Omnisend