Free Online JavaScript Beautifier and Formatter

Clean up messy JavaScript code with our powerful online JavaScript beautifier. Paste minified or poorly formatted JavaScript, and our tool instantly beautifies it with proper indentation, syntax highlighting, and error detection. Perfect for developers, programmers, and anyone working with JavaScript code. No installation required—beautify JavaScript in seconds directly in your browser.

Professional JavaScript beautification features

Instant beautification: Convert minified JavaScript to readable format
Proper indentation: Auto-format with consistent spacing
Syntax highlighting: Color-coded keywords, functions, and variables
Error detection: Identify JavaScript syntax errors
Code folding: Collapse functions for easier navigation
Copy and download: Export beautified JavaScript instantly
Multiple indentation levels: Choose your preferred spacing

Common use cases for JavaScript beautification

Use our JavaScript formatter to clean up minified code, debug obfuscated scripts, improve code readability, and prepare JavaScript for version control. Developers use this tool daily to beautify JavaScript from frameworks, libraries, and web scrapers. Combine with our JavaScript minifier for optimization and JavaScript editor for further refinement.

Why developers choose our JavaScript beautifier

Free, no signup or installation needed
Works on all devices and modern browsers
Handles large JavaScript files efficiently
Real-time formatting with instant preview
Browser-based—your code stays private

Start beautifying JavaScript now with our free online JavaScript beautifier. Trusted by developers worldwide for code cleanup, debugging, and readability improvement.