Developer•Free tool
JS Minifier – Minify JavaScript Online Free
Minify JavaScript by removing comments and unnecessary whitespace. See the size saved and copy or download the compact code.
No sign-upBrowser-based
DEV
Tool
Enter your values and get results instantly.
HOW
How to Use
- 1Paste your JavaScript in the input box\n2. The minified output appears instantly\n3. Check the size reduction\n4. Copy or download the result
WIN
Benefits
Instant minification
Removes comments and whitespace
Shows size saved
Copy or download output
Runs entirely in your browser
FAQ
Frequently Asked Questions
What does JS minification do?
It removes comments, whitespace and line breaks where safe, shrinking the file for faster downloads and parsing.
Is the minified code still valid?
Yes — the logic is preserved exactly. Only safe-to-remove characters are stripped, so the code behaves identically.
Should I always minify JavaScript?
Yes, for production websites minified JavaScript loads faster. Keep the readable version for development.