This free online JavaScript formatter beautifies and reindents messy JS code — and can minify it back down for production with optional name mangling.

All tools on this site run entirely in your browser locally. No data is uploaded to any server.

Features:

• Beautify: Re-indent JavaScript with consistent spacing and clear code structure
• Minify: Strip whitespace and line breaks, compressing everything into a single line
• Mangle names: Shorten variable and function names to protect your code logic
• Compress: Apply safe optimizations to further reduce output size

Common uses:

• Cleaning up unformatted or copied JS for easier reading and debugging
• Compressing JavaScript to reduce page load size
• Obfuscating variable names to protect front-end logic
• Spotting syntax and structural issues in scripts