Prefilled fields
Automatically populate form fields with data you already know — an email address passed from your app, a plan name, a referral code — so respondents don't have to type it themselves.
Key capabilities
- Choose which fields can be pre-filled from the Share tab of your form settings
- Values are passed as parameters on the embed code CustomGForm generates for you
- Works with both the Embed to the web page and Share the link options
- When using Share the link, prefill values are appended as URL query parameters (
?prefill=...)
Prefilled values are set per link/embed, not stored on the form — the same form can be embedded multiple times with different prefilled values.