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Cosmovex

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JavaScript Editor — React IDE app icon

JavaScript Editor — React IDE

Code Editor1K+ downloadsby Cosmovex

Run JavaScript and React on your phone.

A JavaScript and React IDE for Android. Write JS/JSX with syntax highlighting, execute scripts offline, preview React components, and build web app prototypes without a laptop.

JavaScript & ReactOffline ExecutionBuilt-In ConsoleES6+ Support

About JavaScript Editor — React IDE

JavaScript Editor & Runner is a mobile-first JavaScript and React development environment. Write vanilla JavaScript or React/JSX code with full syntax highlighting and run it instantly — offline, on your device. The built-in console captures console.log output, errors, and warnings in real time. React support means you can prototype and preview components without spinning up a Node server. Whether you're learning JavaScript, testing a snippet, or iterating on a React component during a commute — JavaScript Editor & Runner gives you a capable JS environment wherever you are. Pre-loaded examples cover ES6+ syntax, DOM manipulation, async/await, React components, and more.

Screenshots

See it in action

JavaScript Editor — React IDE screenshot 1JavaScript Editor — React IDE screenshot 2JavaScript Editor — React IDE screenshot 3JavaScript Editor — React IDE screenshot 4JavaScript Editor — React IDE screenshot 5JavaScript Editor — React IDE screenshot 6
Features

Everything You Need

JavaScript & React Execution

Run vanilla JS and React/JSX code on-device without a server. Tap Run and see output immediately in the built-in console.

Syntax Highlighting

Full JavaScript and JSX syntax highlighting. ES6+, arrow functions, destructuring, template literals, async/await — all color-coded.

Built-In Console

console.log, console.error, warnings, and runtime exceptions all appear in the integrated console. Debug JS without leaving the app.

React Component Preview

Write JSX React components and preview them directly. Prototype UI components on your phone without a build tool or Node.js.

ES6+ Examples

Pre-loaded examples covering ES6 syntax, arrow functions, Promises, async/await, array methods, destructuring, React components, and more.

Offline & Private

All JavaScript execution happens locally on your device. No cloud, no server, no network. Your scripts stay on your phone.

Ready to Try JavaScript Editor — React IDE?

Free to download. No account required. Available on Android.

FAQ

Frequently Asked Questions

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