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Scratch Addons

github.com/ScratchAddons/ScratchAddons Learn to Code Open-source projectOpen source

For the Scratch platform, Scratch Addons offers a browser extension that brings together add-ons.

Visit Scratch Addons 24 alternatives
github.com/ScratchAddons/ScratchAddons
Scratch Addons homepage screenshot

About Scratch Addons

Scratch Addons is an open-source browser extension for the Scratch website and project editor. It combines community-developed features and themes into one settings page, where users can enable, disable, and configure each addon. Each addon is made of userscripts (JavaScript) or userstyles (CSS) and declares its own manifest that controls when it runs.

The extension is available for Chromium-based browsers and Firefox, and the source can be downloaded with Git without a build step. Other Scratch-based editors can also use most of the addons: the source states that TurboWarp and Adacraft allow most editor addons without a browser extension, and TurboWarp Desktop can run them offline.

Key features

  • Enable, disable, and configure individual addons from a settings page
  • Community-developed features and themes for the Scratch website and project editor
  • Addons written as userscripts (JavaScript) or userstyles (CSS)
  • Each addon declares an addon.json manifest that sets when it runs
  • Built-in addon APIs for waiting on page elements and reacting to settings changes
  • Most editor addons usable in TurboWarp and Adacraft without the browser extension
Best for: Scratch users who want a set of community add-ons for the Scratch website and editor in one configurable extension, and developers who want to build or contribute addons.
Good for
  • Open source, with source available by Git clone and no build step required
  • Addons are described as designed with performance, accessibility, internationalization, and privacy in mind
  • Addons can run in other Scratch-based editors such as TurboWarp and Adacraft
Watch out for
  • Firefox extensions loaded through the temporary add-on method are removed when the browser closes

Scratch Addons at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Platforms
Browser extension
Open source
Yes · Source code
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026
open sourcebrowser extensionchrome extensionschrome firefox

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Scratch Addons FAQ

How do I load the extension in Firefox?
Go to about:debugging, select "This Firefox", click "Load Temporary Add-on...", and select the manifest.json file in the ScratchAddons folder. Extensions loaded this way are removed when the browser is closed.
Do I need to install the browser extension to use the addons?
Not necessarily. The source states that TurboWarp and Adacraft allow you to use most of the editor addons without installing browser extensions, and that TurboWarp Desktop works offline.
How can I get the source code?
The source can be downloaded with Git using git clone https://github.com/ScratchAddons/ScratchAddons.git. No building is required.
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Listing maintained by Chris McClure and the WebIndexly editors · Updated Oct 13, 2026 · How we rank