CSS Minifier - Compress CSS Online

Minify CSS by removing whitespace, comments, and optimizing code. Reduce file size for faster page loads. Fast, private, works in your browser.

Input CSS

Minified Output

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Frequently Asked Questions

Minification removes unnecessary whitespace, line breaks, and comments from CSS without changing functionality. This reduces file size for faster downloads.

No. Minification only removes cosmetic formatting. Your selectors, properties, and values remain the same and work identically.

Typically 20-40% smaller, depending on how much whitespace and comments the original contained. Well-formatted CSS sees the biggest reduction.

Yes. All processing happens in your browser. No code is sent to any server.

For production, yes. Minified CSS loads faster. Keep formatted versions for development. Many build tools automate this process.

Yes. All comments are removed to reduce file size. Important notices like licenses should be preserved via build tools.

You can't restore the exact original, but use a CSS formatter to make minified code readable again with indentation.

Basic optimization like removing unnecessary zeros (0.5 → .5) and shortening colors (#ffffff → #fff) is performed.

This browser tool doesn't generate sourcemaps. For production builds with sourcemaps, use build tools like webpack or PostCSS.

Yes. Works with any valid CSS including Bootstrap, Tailwind, or custom stylesheets. Frameworks often ship pre-minified versions.