Free JavaScript Minifier & Beautifier Online
Minify JavaScript and TypeScript to reduce file size or beautify them for easy reading. Handles ES6+ syntax with optional comment preservation. 100% client-side — your code stays private.
How to Use the JS/TS Minifier & Beautifier
- Paste your JavaScript or TypeScript into the input area above.
- Choose Minify to compress or Beautify to format with indentation.
- Set indentation style and optionally preserve comments during minification.
- Click "Process" or let it auto-process as you type.
- The savings indicator shows the size difference before and after.
- Use "Copy" or "Download" to save your result.
Why Use This JS Minifier
Minifying JavaScript reduces file size by removing whitespace, shortening variable names where safe, and eliminating comments — leading to faster page loads. Beautifying makes minified code readable for debugging.
This tool handles ES6+ syntax including arrow functions, template literals, destructuring, async/await, and modules. It also supports TypeScript files (.ts) with type annotations.
Frequently Asked Questions
Yes. The tool supports modern JavaScript features including arrow functions, template literals, destructuring, async/await, optional chaining, and TypeScript syntax with type annotations.
No. The minifier preserves code semantics. Only whitespace, comments, and certain safe transformations are applied. Always test your minified code in your application.
No. All processing happens entirely in your browser. Your code never leaves your device.
Use Cases
Formatting Minified Bundles
Beautify minified JavaScript bundles to make them readable for debugging and code inspection.
Cleaning Obfuscated Code
Transform obfuscated or compressed JavaScript into a clean, readable format for analysis.
Preparing for Code Reviews
Format JavaScript code to consistent standards before submitting for peer review.
Standardizing Team Style
Enforce consistent coding style across your team by beautifying all JavaScript to the same format.
Readable Debug Output
Convert minified stack traces and error output into readable JavaScript for faster debugging.