JavaScript Minifier
Minify JavaScript code to reduce file size
About JavaScript Minifier
Compress JavaScript by stripping whitespace and comments. See file size reduction at a glance — optimize your scripts for faster page loads.
- Strips whitespace and comments from JavaScript
- Shows exact byte savings and percentage reduction
- Handles modern ES6+ syntax safely
- Preserves all functional code without mangling names
- Works on any size script from snippets to full files
Everything runs in your browser — your data never leaves your device.
How to Use JavaScript Minifier
- Paste your JavaScript code in the input area
- Click Minify to compress the code
- See the size reduction and copy the minified JS
Frequently Asked Questions
What does JavaScript minification do?
It removes whitespace, comments, and unnecessary characters from your JavaScript code, reducing file size for faster page loads without changing functionality.
Does this tool obfuscate or mangle variable names?
This tool focuses on safe minification — removing whitespace and comments. For variable renaming and advanced optimization, use build tools like Terser or UglifyJS.
How much smaller will my JavaScript file be?
Expect 20-40% size reduction depending on comment density and formatting. Combined with gzip compression on your server, total transfer size can drop by 70-80%.
Can minified JavaScript be reversed?
You can "beautify" minified code to restore formatting, but original variable names, comments, and structure are lost. Always keep your source files — minified code is for production delivery only.
