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JavaScript Minifier – Compress ES6, JSX & Async Code

Shrink modern JS bundles by stripping whitespace, comments, and optimizing syntax for production delivery and faster page loads.

🟢 Runs locally · no uploads

JavaScript Minifier

Compress and minify JavaScript to reduce file size

code JavaScript Input
// Initialize app const message = "Hello World"; console.log(message);
check_circle Minified Output
compress
Minified JavaScript will appear here
Keyboard Shortcuts: Ctrl+V to paste • Ctrl+Enter to minify

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› About this tool · FAQ

Stop deploying uncompressed JavaScript! Minify and compress JavaScript code instantly by removing comments, whitespace, and optimizing syntax for production use. Reduces file size by 30-60% for faster page loads. Supports ES6+, async/await, and modern JavaScript. Free, works offline, unlimited minification.

How do I minify JavaScript?

Paste your JavaScript code, configure minification options (remove comments, whitespace, console logs, debugger statements), and minify. The tool compresses JavaScript instantly with detailed compression statistics and file size reduction.

Is this JavaScript minifier free?

Yes, completely free with unlimited minification. No signup required, no watermarks. All compression happens in your browser for complete privacy of JavaScript files and code.

Are JavaScript files uploaded to servers?

No, all JavaScript minification happens locally in your browser. Files never leave your computer, ensuring complete privacy for proprietary code and client projects.

Will JavaScript minification break my code?

Basic minification (removing whitespace and comments) is very safe. Advanced features like name mangling require more careful testing but can provide significant size reduction.

How much can I reduce JavaScript file size?

Typical reduction is 30-60% depending on code structure and comments. Well-commented and formatted code can see even greater reductions.

Are modern JavaScript features supported?

Yes! The minifier handles ES6+, async/await, arrow functions, destructuring, template literals, and other modern JavaScript features.

Should I minify JavaScript during development?

No, keep readable formatting during development. Minification should be part of your build process or deployment pipeline.

Can I preserve specific comments?

Yes, important comments starting with /*! or /** are preserved even when comment removal is enabled.