What is CSS minification?

CSS minification removes unnecessary characters like whitespace and comments from your stylesheets without changing functionality, resulting in smaller file sizes.

How much smaller will my CSS be?

Typically, minification reduces CSS file size by 20-50%. The exact reduction depends on how much whitespace and comments are in your original code.

Will minification break my CSS?

No, minification only removes unnecessary characters. The styling remains identical. Always test your minified CSS to ensure it works as expected.

All tools

CSS Minify

Compress CSS stylesheets for production

Uses CSSO for optimal CSS minification with structure optimization

Input CSS

Minified Output

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

About CSS Minifier

Whitespace and comments make CSS readable while you write it, but they're dead weight when it ships. This free minifier compresses your stylesheet to the smallest working size, removing everything browsers don't need, so your pages load faster. It all happens in your browser, so your code never leaves your device.

How to use CSS Minifier

1
Paste CSS
Paste your CSS stylesheet code in the input area.
2
Minify styles
Click minify to remove whitespace, comments, and optimize selectors.
3
Copy minified CSS
Copy the minified CSS to clipboard or download it.

Related Tools

JSON Formatter

Format, validate and minify JSON data

CSV ↔ JSON

Convert between CSV and JSON formats

Base64 Encode/Decode

Encode or decode text and files to Base64

URL Encode/Decode

Encode or decode URL characters

JavaScript Minify

Compress JavaScript code for production

HTML Minify

Compress HTML documents