Version 0.20.1 May 25, 2026

Pre-filled Form Fields

You can now pre-fill form fields by passing values as URL query parameters. This is useful if you already have some data about a potential new subscriber or want to let users update their preferences.

You can now append ?email=…&data[custom_field]=… to any form URL and the matching fields will open already filled in. Both the standard email field and any custom fields stored under data are supported.

This is especially useful if you want to add a “Manage preferences” links in your email signature. Combined with Liquid variables, you can generate a link that pre-fills each subscriber’s existing data:

[Manage preferences](…/forms/nfrm_…?email={{ contact.email }}&data[custom]={{ contact.data.custom }})

When subscribers click the link, the form opens with their current values.