Technical SEO

JavaScript Minifier

Minify JavaScript to cut file size and speed up your site.

Free to use · No sign-up · Runs in your browser · Your data is never uploaded.

Overview

What the JavaScript Minifier does

The JavaScript minifier compresses your scripts by removing whitespace and comments and shortening the code, reducing the bytes a browser must download and parse.

How it works

The tool uses a proper JavaScript parser to safely remove comments and unnecessary whitespace and to shorten identifiers where possible, without changing behaviour.

Smaller JavaScript loads and executes faster, which improves interactivity metrics and the overall user experience.

Tutorial

How to use the JavaScript Minifier

1
Paste your JavaScript.
2
Run the minifier.
3
Review the size reduction.
4
Copy the minified code.
5
Deploy it and test your site's functionality.

FAQ

JavaScript Minifier questions

No. Minification removes whitespace and shortens names, so keep your original source for editing.

A correct minifier preserves behaviour. Always test after deploying minified code.

Minifying rewrites the code to be smaller; compressing (gzip or Brotli) packs the file for transfer. Use both.

Faster JavaScript improves page experience and Core Web Vitals, which support rankings.

Keep going

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