Compresseur CSS

About CSS Minifier

CSS Minifier is a free online tool that compresses your CSS code by removing unnecessary whitespace, comments, and redundant characters. Smaller CSS files mean faster page loads and better website performance.

Features

• Remove all comments and whitespace
• Compress hex color values (#ffffff → #fff)
• Remove unnecessary semicolons and quotes
• Convert zero values (0px → 0)
• Real-time size comparison with savings percentage
• Copy minified output or download as .css file
• 100% client-side — your code never leaves the browser

How to Use

1. Paste your CSS code into the input area
2. Click "Minify CSS"
3. View the compressed output and size statistics
4. Copy the result or download the .css file

Common Use Cases

• Optimizing production CSS before deployment
• Reducing file size for faster page loads
• Preparing CSS for CDN delivery
• Comparing original vs. minified size
• Quick CSS cleanup during development

FAQ

Is minified CSS still valid?

Yes! Minified CSS is functionally identical to the original. Only unnecessary characters are removed — all selectors, properties, and values remain intact.

Does minification break my styles?

No, CSS minification is safe. It only removes whitespace, comments, and redundant syntax. Your styles will render exactly the same in the browser.

How much size reduction can I expect?

Typically 15–40% reduction depending on how much whitespace and comments your CSS contains. Well-commented CSS can see even higher savings.

Can I undo minification?

Use our CSS Formatter to beautify minified CSS back into a readable format with proper indentation.

Is my CSS data sent to a server?

No. All processing happens in your browser. Your CSS code never leaves your device, ensuring complete privacy.