CSS Minifier

Minify CSS to reduce file size

What is a CSS Minifier?

A CSS minifier is a free online tool for reducing the size of CSS files by removing unnecessary whitespace, comments and other characters. This can improve page load speed and reduce bandwidth usage. All minification happens in the browser.

How to minify CSS

Paste your CSS code into the input field. Click the minify button. The tool removes whitespace and comments to produce a smaller output. Copy the result or download the minified file.

How minification works

Minification removes characters that are not needed in CSS: multiple spaces become a single space, CSS comments are removed, line breaks are removed, and values are shortened where possible.

Common use cases

  • Optimize page load speed
  • Reduce bandwidth usage
  • Prepare CSS for production
  • Reduce stylesheet size
  • Optimize server responses

Frequently Asked Questions

What is CSS minification?+
CSS minification reduces the size of a CSS file by removing unnecessary whitespace, comments and other characters. This can improve page load speed and reduce bandwidth usage.
How do I minify CSS?+
Paste your CSS code into the input field. Click the minify button. The tool removes whitespace and comments to produce a smaller output. Copy the result or download the minified file.
Does minification affect CSS functionality?+
No. Minification only removes characters that are unnecessary for rendering. The functionality of your CSS remains unchanged. However, it may make the code harder to read or debug.
How much can minification reduce file size?+
The reduction depends on the original CSS. Files with lots of whitespace and comments can be reduced by 50-80%. Already compact CSS may see only a small reduction.
Is my CSS sent to a server?+
No. All minification happens locally in your browser. The code never leaves your device.
Can I minify large CSS files?+
Yes. Since minification happens in the browser, it can handle large CSS files. However, very large files (>50 MB) may be slow due to browser memory limits.

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CSS Minifier — free online css minifier, css minify, minify css, css code minification, css size reduction, css optimization, css cleaner, css compression tool. No signup required. Works in your browser.