What is JavaScript minification?

Minification removes unnecessary characters from JavaScript code - whitespace, comments, and line breaks - without changing functionality. This reduces file size for faster page loads.

How much smaller will my code be?

Typically, minification reduces JavaScript file size by 30-60%. The exact reduction depends on how much whitespace and comments are in your original code.

Will minification break my code?

No, minification only removes unnecessary characters. The code functionality remains identical. However, always test your minified code to ensure it works as expected in your specific environment.

All tools

JavaScript Minify

Compress JavaScript code for production

Compression (dead code removal, etc.)Mangle (shorten variables)

Input JavaScript

Minified Output

Privacy: Your code is processed locally with Terser in your browser. Nothing is sent to a server.

About JavaScript Minifier

Every unnecessary space, line break and comment in your JavaScript makes the file bigger and your site slower to load. This free minifier strips all of that out and shrinks your JS to the smallest size that still works, so pages load faster for your visitors. It runs entirely in your browser, so your code is never uploaded to a server.

How to use JavaScript Minifier

1
Paste JavaScript
Paste your JavaScript code in the input area.
2
Minify code
Click minify to remove whitespace, comments, and shorten variable names.
3
Copy minified code
Copy the minified JavaScript to clipboard or download it.

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