How to Use Node.js Playground
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1. Write Node.js Code
Type your script using Node.js core modules like fs, path, events, or streams.
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2. Run It
Click Run or press ⌘↵. Your code runs on a Node.js 18 runtime via the Judge0 engine.
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3. View Output
console.log() output and errors appear in the Output panel.
The Technical Details
This interactive web utility provides fast, reliable, and completely private data transformations. In modern workflows, quick formatting, conversions, or estimations are essential. By running all logic entirely in your browser with client-side JavaScript, this tool guarantees that your data never leaves your machine. This approach delivers maximum performance and absolute data privacy, as no information is ever sent to a server.
Frequently Asked Questions
Which Node.js version is used?
Node.js 18 (LTS) on the Judge0 CE sandbox.
Can I require npm packages?
No. Only Node.js built-in core modules are available: no npm or node_modules.
Can I perform HTTP requests?
Outbound network calls are blocked by the Judge0 sandbox for security.
Is my code private?
Code is submitted to the public Judge0 CE API. Avoid pasting sensitive data.