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About
RunJS is a JavaScript runtime environment that combines Node.js and Browser APIs in a single workspace. It provides full DOM access alongside Node.js capabilities, offering more versatility than the standard Node REPL or Chrome DevTools console. Developers can test and run JavaScript code with access to both server-side and browser APIs without switching between multiple tools.
Highlights
- Node.js and Browser APIs in one environment
- Full DOM access for interactive testing
- More versatile than Node REPL or Chrome console
Best for
Developers who need to test and run JavaScript code with both server-side and browser capabilities in a single workspace, without switching between the Node REPL and browser DevTools.
At a glance
RunJS is available on macOS — all free to download.
It is developed by Haas Labs Ltd.
Frequently Asked Questions
- Is RunJS free?
- Yes — RunJS is free to download on macOS.
- What platforms is RunJS available on?
- RunJS is available on macOS.
- What is RunJS?
- RunJS is a JavaScript runtime environment that combines Node.js and Browser APIs in one workspace, giving you full DOM access and more versatility than the standard Node REPL or Chrome console.
- What are the alternatives to RunJS?
- RunJS is similar to Kaleidoscope, Dash for macOS, Sublime Text, and Visual Studio Code - VSCode. Browse related apps by tag: browser, ide, code editor, and developer.



