Capture campaign and context data invisibly

Record where a submission came from without asking the respondent.

Open this guide in the help center →

1. Open hidden fields

   In the form builder settings rail, choose Hidden fields. These are captured with every submission but never shown to the person filling the form in.

2. Add a field and name it

   Give each hidden field a name you will recognize in the submissions table and in any system you export to.

3. Choose where the value comes from

   A URL parameter reads a value from the link, which is how campaign tracking works — add a field reading utm_source and it captures whatever the incoming link carries. A static value stamps every submission with the same constant, useful for marking a site or channel. A form field copies a value from elsewhere in the form.

4. Build the links you will share

   Append the parameters to your public link, one distinct link per campaign, channel, or partner. Anything not present in the link simply arrives empty.

5. Verify with a real submission

   Open one of your campaign links, submit, and confirm the value landed. A mistyped parameter name fails silently, which is why this step matters.

Features covered

• Hidden fields
• URL prefill
• Submissions inbox

Continue learning

• Conditional questions and quizzes
• Publishing, access, and confirmation
• Embed forms and share links
• Manage responses and export data