Quick Answer
How much smaller will my CSS file be? Typical reduction is 20-40% by removing whitespace, comments, and optimizing values. Results vary based on your original code style.
Frequently Asked Questions
Minification removes unnecessary characters without changing functionality: whitespace, comments, newlines, and shortens color codes (like #ffffff to #fff). It can also combine selectors, shorten property values, and remove redundant semicolons.
Typical reduction is 20-40% depending on your original code style. Well-commented CSS with lots of whitespace sees bigger gains. Already-minified files will show minimal improvement. The tool shows exact before/after sizes.
Safe minification should never break valid CSS. This tool uses conservative settings that remove only whitespace and comments. Aggressive optimizations like property merging are optional and should be tested before production use.
Keep unminified CSS during development for readability and debugging. Minify only for production deployment. Most build tools (Webpack, Gulp, etc.) handle this automatically with source maps for debugging.
Yes — the minifier handles all standard CSS including CSS3 properties, custom properties (CSS variables), @keyframes, @media queries, @supports, and nested selectors from CSS Nesting specification.
Yes — batch processing lets you minify multiple files simultaneously. Each file is processed independently and you can download all results as a ZIP archive.