Add-on: JWT Prefill

JWT Prefill is a Gravity Forms add-on that prefills form fields from a signed JSON Web Token (JWT) instead of editable URL parameters. The token is checked with a private key before the form loads, so visitors cannot change the prefilled data. Use it for personal links in emails, member forms and any form where the prefilled values must be trusted.

What you can do with JWT Prefill

• Fill fields from the claims in the token: a claim text fills the field with dynamic population parameter text.
• Check every token with a private key per form.
• Load a form only when a valid token is passed, optionally within a start and end time.
• Allow or block specific tokens with lists in another form, and change the error messages.
• Generate token links with the [gwp_jwt_link] shortcode or a Gravity Flow step.
• Store and validate the token in the JSON Web Token field, and read single claims with a merge tag modifier.

Where to start

1. Settings JWT Prefill: set the private key and the token rules for a form.
2. Populate Dynamically: connect claims to fields.
3. Shortcode gwp_jwt_link: create the links.

Requirements

• Gravity Forms 2.5 or later
• WordPress 5.0 or later
• PHP 7.4 or later
• Optional: Gravity Flow, for the Generate prefill JWT workflow step

Features, pricing and a live demo are on the JWT Prefill product page.