Fillout Form UTM Tracking Integration

• Track UTMs natively in Fillout Form with HandL UTM Grabber
• Send Fillout Form UTMs via Zapier or Webhook

Track UTMs natively in Fillout Form with HandL UTM Grabber

UTM attribution overview

This guide explains Track UTMs natively in Fillout Form with HandL UTM Grabber. It helps you capture UTM source, medium, campaign, term, content, click IDs, referrer, and landing page data and keep the marketing context needed for accurate reporting across forms, bookings, signups, and sales.

Register the URL Parameters

Based on the documentation provided in this link, please register the UTM parameters that you wish to track:

https://www.fillout.com/help/embedded-url-parameters

Embed Fields in the Form and Set Default Values

Create UTM fields as hidden fields in your form one by one. Then, assign default values as URL parameters that you have set in the first step.

Modify the Embedded Form as Follows

Remove the <script> tag from your embed code as shown below.

<div style="width: 100%; height: 500px;" data-fillout-id="213456789" data-fillout-embed-type="standard" data-fillout-inherit-parameters="" data-fillout-dynamic-resize=""></div>
<script src="https://server.fillout.com/embed/v1/"></script>

<div style="width: 100%; height: 500px;" data-fillout-id="213456789" data-fillout-embed-type="standard" data-fillout-inherit-parameters="" data-fillout-dynamic-resize="" ></div>

Send Fillout Form UTMs via Zapier or Webhook

UTM attribution overview

This walkthrough covers sending full UTM Grabber data from Fillout Form to Zapier, Make, or your own webhook. Handy when you need gclid, fbclid, first-touch fields, or custom params alongside the lead or order.

For the primary setup, see the main Fillout Form guide.

When a webhook makes sense

Native fields in Fillout Form often stop at basic UTMs. A webhook lets you push everything UTM Grabber stores without trimming values or losing click IDs.

Thank-you page script

Paste this on your confirmation page. Swap in your Zapier or Make hook URL.

<script>
var qvars = {};
window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m, key, value) {
    qvars[key] = decodeURIComponent(value.replace(/\+/g, ' '));
});
qvars = Object.assign({}, (typeof handl_utm !== 'undefined' ? handl_utm : {}), qvars);
setTimeout(function() {
    var data = new URLSearchParams(qvars).toString();
    var xmlHttp = new XMLHttpRequest();
    xmlHttp.open('GET', 'https://hooks.zapier.com/hooks/catch/YOUR_ID/YOUR_KEY/?' + data, true);
    xmlHttp.send(null);
}, 1000);
</script>

Full pattern explained in Triggering Zapier on Thank you Page.

Quick Zapier / Make checklist

1. Create a Catch Hook trigger and copy the URL
2. Run a test conversion with UTMs in the landing URL
3. Confirm gclid, utm_source, and email (if present) show up in the payload
4. Map fields into your CRM or spreadsheet

Parameter reference: Native WP Shortcodes.

Make users: see Make Integromat integration.