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JavaScript Formatter - Free Online JS Beautify & Format

Free online JavaScript code formatter and beautifier. Format messy JS files with proper indentation, minify scripts for production, and organize JavaScript code structure. Supports ES6+ syntax. Perfect for web developers cleaning up code.

How to Use JavaScript Formatter

Quick Start Guide

Paste your JavaScript code into the input area — copy directly from your .js file, IDE or browser DevTools

Click the Format button to beautify JavaScript with proper indentation, consistent spacing and organized structure

Use the Minify mode toggle to compress JS code for production deployment by removing whitespace and comments

Copy the formatted or minified result with one click — ready to paste back into your project or deploy to production

Frequently Asked Questions

This free online JavaScript formatter beautifies messy JS code by adding proper indentation, consistent line breaks and organized spacing. It makes minified or poorly formatted code readable in seconds. The output is valid JavaScript that runs identically to the original.

Yes. The formatter fully supports ES6+ features including arrow functions, template literals, destructuring assignments, async/await, optional chaining, and spread operators. Your modern JavaScript code is handled correctly.

Yes. Switch to Minify mode to compress JavaScript by removing unnecessary whitespace, line breaks and comments. Use our dedicated <a href="/tools/javascript-minifier">JavaScript minifier</a> if you need file size comparison and advanced compression options.

Absolutely. All formatting and minification runs entirely in your browser using client-side JavaScript. Your code is never uploaded to any server, transmitted over the network, or stored anywhere. Your intellectual property stays completely private.

Still have questions? Check out our other tools or contact us for support.

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