What does JavaScript minification do?

It removes comments, extra whitespace, and unnecessary characters from your JS code. This typically reduces file size by 20-50%, making your website load faster.

Will minification break my code?

Our minifier performs safe transformations — removing whitespace and comments. It does not rename variables or perform advanced optimizations. For most code, the output is functionally identical.

Is my code sent to a server?

No. All minification happens in your browser using JavaScript. Your code never leaves your device.

Should I use this for production?

For quick, one-off minification of small scripts, absolutely. For production apps with many files, use a bundler like Webpack or Vite that can also do tree-shaking and code splitting.

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JavaScript Minifier

Minify JavaScript code to reduce file size — remove comments, whitespace, and optimize.

Input JavaScript

Minified JavaScript

How to Use JavaScript Minifier

1
Paste your JavaScript code in the input area.
2
Click "Minify JavaScript" to process.
3
See the minified output with file size stats.
4
Copy the minified code with one click.

About JavaScript Minifier

Minify your JavaScript code instantly to shrink file sizes and boost website performance. Our JS Minifier strips out comments, collapses whitespace, removes unnecessary semicolons, and produces compact output ready for production.

Paste your JavaScript on the left, click "Minify JavaScript," and get optimized output on the right. The tool shows exact bytes saved and compression percentage. All processing happens in your browser — your code never leaves your device.

Perfect for quick minification of small scripts without configuring Webpack, Rollup, or other build tools. For production apps with multiple files, we recommend a proper bundler — but for single-file minification, this tool is fast, free, and private.