A better way to
build React user

React Cosmos is a sandbox for developing and testing UI components in isolation.
It's fast, extendable and easy to install. Our users love it.

  • Prototype quickly, debug easily
    and maintain quality at scale.
  • Stay organized with a well-
    designed component library.

Key Features

  • Fixtures File-system based module convention for defining component states effortlessly.
  • User Interface Playground for browsing fixtures and manipulating components. Learn more →
  • Static Export Interactive component library deployable to any static hosting service.
  • Integration Vite, Webpack, React Native, Next.js, and support for custom setups.
  • Plugins Full-stack plugin system for extending every aspect of React Cosmos.
  • High Quality 100% TypeScript. Minimal deps. Meticulously designed and tested.