JavaScript Formatter & Beautifier Online
Beautify or minify JavaScript code with proper indentation.
Processed locally in your browserUnlock the full toolkit
Batch processing, no ads, higher limits, and API access.
How to Use
Format, beautify, or minify JavaScript code instantly with this free online tool.
- Paste your JavaScript code into the input area, or upload a .js file.
- Choose Beautify to add proper indentation, or Minify to compress the code.
- Select your preferred indentation style.
- The formatted output appears instantly.
- Click Copy or Download to save the result.
All formatting happens in your browser — your code is never sent to any server.
Features
- ✓Beautify with configurable indentation
- ✓Minify to reduce file size
- ✓Preserves strings and comments
- ✓File upload support
- ✓One-click copy & download
- ✓Size comparison display
Frequently Asked Questions
- What does a JavaScript formatter do?
- A JavaScript formatter takes messy or compressed JS code and restructures it with proper indentation, line breaks, and spacing. This makes code easier to read, debug, and maintain. It can also minify code by removing whitespace and comments to reduce file size for production.
- Does formatting JavaScript change how it runs?
- No. Formatting only changes whitespace, indentation, and line breaks — it does not alter the logic or behavior of your code. The JavaScript engine treats formatted and minified code identically.
- When should I minify JavaScript?
- Minify JavaScript before deploying to production to reduce file size and improve page load speed. Minification removes comments, extra whitespace, and shortens code. For development, use beautified code for readability. Most build tools like webpack and esbuild handle minification automatically.