Runjs.app
RunJS - JavaScript Playground for macOS, Windows and Linux
RunJS is a desktop app that lets you write, run, and experiment with JavaScript and Node.js code, offering live feedback and helpful code suggestions.
Write and test JavaScript with instant results
RunJS is a desktop playground designed for anyone who wants to write, run, and experiment with JavaScript code. With live feedback as you type, you can instantly see the results of your code line by line, making it easy to understand how your code works and spot errors right away.
The app supports both Node.js and browser APIs, so you can prototype ideas, learn new JavaScript concepts, or test code snippets in a familiar environment. Features like autocomplete, inline type checking, and quick documentation help you code more efficiently and confidently.
Whether you're a beginner learning JavaScript or an experienced developer prototyping solutions, RunJS gives you a simple, distraction-free space to explore and build with JavaScript on your desktop.
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