Development
Learn how to build Replit extensions using React, Extension Devtools, and API integrations. Get started with templates or manual installation.
Extension Devtools
In every extension Replit App, you will see a button labeled Extension Devtools in the top-right corner of the workspace.
React Development
Learn how to build an extension using React.
Full-Stack
While full-stack extensions are not supported within a single Replit App (aka a monorepo) at this time, you can always call out from your Extension client Replit App to any outside API endpoints.
Manual Installation
While we recommend using our Templates to get started, you can also install the API client manually.