JavaScript → RunJS: JS developer’s co-pilot

For over a year, Ive been using RunJS. This powerful tool offers a playground for running JavaScript, TypeScript, and Node.js. It helps a lot to test snippets, debug code, or simply try new concepts quickly. RunJS displays results immediately. This feature is particularly useful for experimenting.


The application keeps up with the latest language features and allows to use npm packages directly within the app, which is great. The app offers excellent syntax highlighting and auto-formatting.

For those new to JavaScript or TypeScript, RunJS is a fantastic learning environment. Debugging is more straightforward with RunJS, thanks to its instant output and error reporting. This makes it easier to pinpoint and resolve issues in your code.

A user-friendly interface, combined with robust features, makes it an essential application for developers like me. So highly recommend!