Pro Feature
Hidden Fields
Capture URL parameters and other data invisibly to track traffic sources and campaigns.
Use Cases
📊 UTM Tracking
Capture utm_source, utm_medium, utm_campaign from ad URLs
🆔 User IDs
Pass user IDs from your app to link responses
🏷️ Referrer Tracking
Know which page or partner sent the user
Setup
- Add a Hidden Field question type
- Set the field name (e.g., "utm_source")
- The field will auto-populate from URL parameters
Example URL:
https://qualifyform.com/f/your-form?utm_source=facebook&utm_campaign=q1_launchThe hidden fields will automatically capture "facebook" and "q1_launch".
Pro tip
Combine hidden fields with pixel rules to fire events only for leads from specific campaigns.