JS Minifier
JavaScript Minifier and Beautifier
Minify JavaScript for production or beautify for readability. Optimize code performance and size.
JavaScript Input
Privacy: Processing happens in your browser. Files and text are not uploaded to Anwita Digital servers.
How to use this tool
- Paste JavaScript code into editor
- Click Minify to compress (remove whitespace, shorten variables)
- Or click Beautify to format with proper indentation
- View size reduction and optimization results
- Copy minified JS for production deployment
- Use beautified JS for development and debugging
About JS Minifier
JavaScript minification removes whitespace, comments, and shortens variable names where safe, reducing file size by 30-60%. Smaller JS files download faster, parse quicker, and improve page performance, critical for modern web apps with large JS bundles.
Beautifying reverses minification (when possible), adding indentation and line breaks. Use to explore minified third-party libraries or format compressed code for debugging.
All processing uses browser-based JavaScript parsers. No code is uploaded, protecting proprietary algorithms, business logic, or confidential application code.
Frequently asked questions
Not if code is valid. Minification is safe for syntactically correct code. However, it may expose bugs hidden by loose mode. Always test minified output. Variable shortening can complicate debugging, use source maps in production.
Typically 30-60% size reduction from minification alone. Combined with gzip (server-side), total reduction can reach 70-80%. Modern build tools (webpack, rollup, esbuild) also tree-shake unused code for additional savings.
No. Minification permanently shortens variable names (myLongVariableName becomes a). Beautifying adds formatting but can't recover original names. Use source maps for debugging production code.