JavaScript Minifier & Beautifier
Minify JavaScript for size or beautify it for readability with error handling.
Runs locally in your browser. Your input is not uploaded.
JavaScript Minifier & Beautifier is a free online tool that minifies JS for production or beautifies it for readability. Minification strips whitespace and comments to reduce bundle size, improving page load time. Syntax errors are caught before processing so you never minify broken code.
Frequently Asked Questions
What is JavaScript minification? +
Minification removes whitespace, comments, and shortens variable names to reduce file size for faster page loads.
Does it handle syntax errors? +
Yes, syntax errors are detected and displayed before processing so you can fix the code first.
Is this tool safe to use with production code? +
Always test minified output before deploying. This tool processes code locally without uploading it to any server.
Is my data private? +
Yes, all processing happens in your browser. No code is sent to any server.
How to Use
- 1
Paste your JavaScript
Enter the JavaScript code you want to format — minified bundles, snippets, or full files.
- 2
Beautify or Minify
Click "Beautify" to make the code readable, or "Minify" to reduce file size for production deployment.
- 3
Copy the output
Copy the formatted or minified JavaScript and replace your source file.
Frequently Asked Questions
- Adds indentation, line breaks, and consistent spacing to make JavaScript human-readable. Essential for working with minified third-party code.