CSS Minifier
Optimize CSS stylesheets by removing whitespace, comments, and redundant rules. Produces smaller files for faster page loads.
Minification Options
Pro Tips
About CSS minification
CSS minification reduces file size by stripping comments, collapsing whitespace, shortening color values (e.g., #ffffff → #fff), and removing unnecessary semicolons and units. The minified output is functionally identical to the original.
CSS files are render-blocking resources — the browser cannot display the page until all CSS is downloaded and parsed. Smaller CSS files directly improve First Contentful Paint and Largest Contentful Paint metrics, which are Core Web Vitals used by Google for ranking.
Frequently Asked Questions
A CSS minifier removes comments, extra whitespace, line breaks, and unnecessary semicolons from your stylesheets. The output is a smaller file that produces the exact same visual result in the browser.
No. Minification only removes formatting characters that browsers ignore. All selectors, properties, and values stay the same. Your pages will look identical.
Yes. Minified CSS reduces network transfer size, which improves page load speed and Core Web Vitals scores. Most build tools automate this, but you can also use this online tool for quick, one-off optimizations.
Yes. The minifier handles all valid CSS including media queries, keyframe animations, custom properties, and nested selectors.
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