Welcome to Extensions!
Make Chrome more powerful by customizing the browser to your needs.
Featured
Extensions and AI
Extend the web
Learn why Extensions are so powerful and how you can customize Chrome's browsing to your needs.
Extensions on YouTube
Insights and news from the Extensions ecosystem.
How to know if permissions are safe to request in your Chrome Extension
Oliver explains what you should consider when requesting new permissions in your extension.
Everything that happened with Chrome Extensions in 2025
See a wrap up of everything that happened in 2025 with Chrome Extensions.
Can you make a cross-browser Chrome Extension?
Learn how to build a cross-browser extension.
Extensions in action
Load these sample extensions on your local computer.
Action API demo
This sample demonstrates the use of the Action API which changes the icon, icon badge, hover text or popup page depending on the user's choice or action.
UserScript API demo
A user script can be created by users or downloaded from a script repository. This sample
allows you to inject files and arbitrary code added in an options page.
Scripting API demo
This sample demonstrates how you can inject JavaScript into web pages using the Scripting API.
SidePanel API demo
This sample demonstrates how to create a side panel that opens when the user clicks a button on a page or opens a context menu.
Documentation
Everything you need to know about Chrome Extensions.
Get started
Build your first extension.
Develop
Learn how Chrome Extensions work and what they can do.
How-to
Learn to solve specific use cases in Chrome Extensions.
Reference
Reference documentation for Extensions APIs, manifest keys, and permissions.
Extensions posts
Read the most recent Chrome Extensions blog posts
Support and feedback
Get help developing your extension, and help us make Chrome Extensions better.
Get help with Chrome Extensions
Get answers to questions not covered by the documentation.
File a bug
Report extension bugs or problems with documentation.
Request a feature
Submit a request for a feature that you believe could improve the extension platform.
Find and follow a bug report
Check whether a bug or feature request has already been reported.