JavaScript Minifier - Compress & Optimize JS Files Online
Free online JavaScript minifier tool to compress and optimize your JS files. Reduce file size up to 80%, remove comments and whitespace, improve website loading speed. No installation required, 100% secure.
Original Code
Minified Code
Secure Processing
All JavaScript minification happens locally in your browser. We never send your code to external servers.
Real-Time Preview
See exactly how your code will be minified before processing. Preview changes instantly.
100% Free
No registration, no watermarks, no file size limits. Unlimited usage completely free forever.
Batch Processing
Minify multiple JavaScript files at once. Perfect for projects with multiple JS files.
Why Minify JavaScript?
Reduce file size up to 80% for significantly faster website loading times
Lower bandwidth consumption for you and your visitors
Improve page speed scores which positively impact search engine rankings
Obfuscate code to make it harder to reverse engineer
Perfect For:
- Web Developers: Optimize production code before deployment
- WordPress Users: Minify plugin and theme JavaScript files
- Mobile Apps: Reduce React Native or hybrid app bundle sizes
- E-commerce Sites: Speed up checkout and product pages
- Bloggers: Optimize scripts for faster page loads
- Agencies: Bundle and minify client project files
🎯 Minification Tips
For Production: Use Aggressive mode with variable shortening enabled
For Development: Use Light mode to preserve readability
Libraries/Frameworks: Use Ultra mode for maximum compression
Debugging Code: Enable "Remove console.log()" for production
❓ Frequently Asked Questions
Is my JavaScript code safe?
Yes! All processing happens locally in your browser. Your code never leaves your computer.
Does minification break my code?
Not with our tool. We use safe minification techniques that preserve functionality.
What's the maximum file size?
There's no limit! Our tool can handle any JavaScript file your browser can process.
Can I minify ES6/ESNext code?
Yes! Our minifier supports modern JavaScript syntax including ES6, ES7, and ES8 features.
Does it work with React/Vue/Angular?
Absolutely! Works perfectly with all major JavaScript frameworks and libraries.
✅ Supported Syntax & Features
📝 Before & After Example
Original JavaScript
// Calculate total price
function calculateTotal(price, quantity, taxRate) {
// Calculate subtotal
let subtotal = price * quantity;
// Calculate tax
let taxAmount = subtotal * taxRate;
// Calculate total
let total = subtotal + taxAmount;
// Log to console for debugging
console.log('Subtotal:', subtotal);
console.log('Tax:', taxAmount);
console.log('Total:', total);
return total;
}Minified JavaScript
function calculateTotal(e,t,n){let r=e*t;let a=r*n;let o=r+a;return o;}