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JavaScript Beautifier Online
Format and beautify JavaScript code with customizable options.
javascript
formatter
beautifier
About JavaScript Beautifier & Formatter
This free online JavaScript beautifier and formatter tool helps you format, beautify, and organize JavaScript code with customizable indentation options. Essential for code maintenance, debugging, and improving readability.
Key Features
- Code beautification to transform minified JavaScript into readable format
- Customizable indentation with 2, 4, or 8 spaces, or tab options
- Real-time JavaScript syntax validation with detailed error messages
- File upload and download capabilities for batch processing
- Auto-validation to check syntax as you type
- Copy to clipboard or download formatted code as .js files
- Client-side fallback support for reliable processing
- Intelligent brace and whitespace formatting
Use Cases
- Code review - format code for better readability before reviews
- Debugging - make minified production code readable for troubleshooting
- Code maintenance - clean up and organize existing JavaScript files
- Learning - understand complex code structure through proper formatting
- Development - ensure consistent formatting across projects
- Documentation - prepare clean code examples for guides
Supported Formats
JavaScript (ES5, ES6+)
Minified JavaScript
Node.js Code
React/JSX Components
TypeScript (basic)
JSON Objects and Arrays
Related Keywords
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js formatter
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code formatter
javascript pretty print
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Development Tip
Use this tool to format minified JavaScript from production builds when debugging. The beautified code will be much easier to read and understand, helping you identify issues more quickly.
Privacy & Security
All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.
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