Pass URL parameters (hidden fields) to your embedded Fillout forms to personalize text, track UTM campaigns, or track unique submissions for different respondents.
Register URL parameters, if you haven’t yet
Paste the code
Get the code
. Then paste into your site.In the Embed code, add data attributes for each URL parameter
ref
, you can use data-ref="Facebook"
. Your embedding code will look something like this:Share your form link
Publish
in the upper right corner and share your form.