Hidden fields: read values from the link (UTM, names, IDs)
Capture ?utm_source=newsletter or ?name=Sam from the assessment's link, use it in logic, and pre-fill questions.
Where to find it: LogicHidden fields & variablesValues from the link
Capture and route leads · step 3 of 7Next: How integrations work: connect once, switch on per assessment →
A hidden field reads a value from the assessment's link. The respondent never sees it, but it's saved with their response and can drive logic, text and integrations.
- Add a hidden fieldIn Hidden fields & variables, under Values from the link, enter the URL parameter name, e.g.
utm_source. Add a Display name if you like. - Optional: pre-fill a questionPre-fill a question… puts the value straight into a question's answer, e.g. a known email address. People can still change it.
- Add it to your linkShare
https://forms.marketkloud.com/f/your-form?utm_source=newsletter. Several values are joined with&:?utm_source=newsletter&name=Sam.
What you can do with it
- Branch on it: plan equal to premium → skip the pricing question.
- Recall it: Hi @name.
- See it in Results, exports and CRM payloads, under each response.
- Map it to a CRM field: a fixed value per campaign link, e.g.
lead_source.