Customizing Umbraco Forms Themes - CSS & JS from Default theme

sebastiaan · November 25, 2025, 2:07pm

Please add your voices here so the Forms team will see them and they don’t get lost in forum posts:

github.com/umbraco/Umbraco.Forms.Issues

Umbraco.Forms.Themes GitHub repository

opened 03:55AM - 26 Jul 24 UTC

type/feature

One of the most common frustrations when upgrading Umbraco Forms to a new versio…n is figuring out what changes need to be applied to a custom theme. Umbraco Forms' default themes are currently provided as .zip files in [the Umbraco Forms documentation](https://docs.umbraco.com/umbraco-forms/developer/themes) - but these aren't readily available for every version, and don't show what has changed compared to a given previous version. Old default versions are often not available, and (depending on the level of modification) comparing a custom theme to the latest default version can be time consuming. A public Umbraco.Forms.Themes GitHub repository would be a useful tool for providing access to new and historical theme packages, and allowing developers to more easily see the changes between different versions.

To be fair, adding that link above, it will immediately link from GitHub back to here, so you don’t need to write it all again