Hidden Fields & UTM Tracking (Pass Data via Form URL)

Hidden fields let you pass data into your form through the form URL. This allows you to capture additional context about respondents, personalize their experience, and improve how you analyze form submissions.

A hidden field is a value that is included in your form but not visible to the respondent. It helps you track users and use existing data without asking them to fill it out again.

Common use cases include:

• Track traffic sources (e.g. social media, website, campaigns)
• Pass known user data (such as name or email) into responses
• Personalize form content using recall information
• Capture UTM parameters for marketing attribution

To set up hidden fields:

• Open your form and go to the Settings tab
• Navigate to Tracking & Hidden Fields
• Toggle UTM parameters as needed
• Add custom field names in the Hidden Fields input section

In this example, you can enable utm_source and add custom fields like name and ref.
After making your changes, click Submit to save.

Once your hidden fields are set up, you can pass values through your form’s shareable URL.

Find your form link in the Share tab:

Before sharing the link, append parameters and values to the URL.

There are two ways to do this:

• Manually – add parameters directly to the URL (ensure values are URL encoded)
• Automated – use tools like CRMs or email platforms to generate dynamic links with prefilled data

Hidden field values appear alongside other responses in the Results tab after a form is submitted.

You can use hidden field values inside your form using recall information.

If you’re embedding your form on a website, you can still pass hidden field values via the URL.

Read more here → Use hidden fields in embedded forms