What does CSS minification do?

CSS minification removes all characters that aren't needed for the browser to parse and apply the stylesheet — including comments, extra spaces, tabs, newlines, and redundant semicolons. The result is functionally identical CSS with a smaller file size, which speeds up page loads.

Is my CSS safe? Does anything get uploaded?

Yes, completely safe. This tool runs 100% in your browser using JavaScript. Your CSS code is never sent to any server and is not stored or logged anywhere.

How much can minification reduce my CSS file size?

Typical stylesheets see 20–70% reduction in size. The savings depend on how many comments and how much whitespace your original file contains. Files with many block comments or verbose formatting save the most.

Will minified CSS still work the same?

Yes. Minification only removes characters that are invisible to the browser (whitespace, comments). It does not change property names, values, selectors, or the order of rules, so the visual output is identical.

Can I minify CSS with @media queries and keyframes?

Absolutely. This minifier handles all standard CSS constructs including @media, @keyframes, @supports, @layer, custom properties (CSS variables), and nested rules.

How do I use the minified CSS in production?

Copy the minified output and paste it into your production stylesheet, or download the .css file and replace your original. For automated workflows, consider a build tool like PostCSS with cssnano.

Free & instant CSS compression

Minify Your CSS,
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Paste your CSS and get a minified version in milliseconds. Removes comments, extra whitespace, and redundant characters to shrink file size by up to 70% — all in the browser.

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Instant Minification

Results appear in real-time as you type or paste. No waiting, no server round-trips.

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100% Private

Your CSS never leaves your browser. No uploads, no tracking of your code.

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Compression Stats

See original size, minified size, and exact percentage saved at a glance.

Input CSS

1 lines · 0 bytes

Minified CSS

0 bytes

Paste CSS above or to get started.

Frequently Asked Questions

Everything you need to know about CSS Minifier.

Minify Your CSS,Ship Faster

Instant Minification

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Compression Stats

Frequently Asked Questions

Minify Your CSS,
Ship Faster