What does CSS minification do?

It removes comments, extra whitespace, line breaks, and unnecessary characters from your CSS. This reduces file size by 20-60% typically, making your website load faster.

Will minification break my CSS?

No. Minification only removes formatting — it does not change the meaning of your CSS rules. The output is functionally identical to the input.

How much file size can I save?

Typically 20-60% depending on how your CSS is formatted. Well-commented CSS with lots of whitespace will see larger savings.

Is my code sent to a server?

No. All processing happens in your browser. Your CSS code never leaves your device.

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CSS Minifier

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

Updated Mar 2026100% Private — runs in browser

Input CSS

Minified CSS

How to Use CSS Minifier

1
Paste your CSS code in the input area on the left.
2
Click "Minify CSS" to process.
3
See the minified output on the right with file size stats.
4
Copy the minified CSS with the copy button.
5
Paste into your production CSS files.

About CSS Minifier

Minify your CSS code instantly with our free CSS minifier. Remove comments, collapse whitespace, strip unnecessary semicolons, and apply basic optimizations like converting 0px to 0 — all with one click.

Key Features

Instant Minification: Paste your CSS and get optimized output immediately.
Bytes Saved Display: Shows exact bytes saved and compression percentage.
Safe Transformations: Removes formatting only — your CSS rules remain functionally identical.
One-Click Copy: Copy the minified CSS to clipboard instantly.
Typical Savings: Reduces file size by 20-60% depending on formatting style.

Who Is This For?

Front-end developers who need quick minification of stylesheets without configuring Webpack, Gulp, or other build tools. Great for one-off files, code challenges, and CMS themes.

Privacy & Security

Runs 100% in your browser — your code is never sent to any server.