Developer
CSS Minifier
Minify and optimize your CSS code to reduce file size and improve performance.
What minification is trying to achieve
Minified CSS removes extra whitespace and comments to reduce file size. That can help page load, especially for large stylesheets, when paired with proper caching, compression, and build pipelines. It does not remove unused CSS by itself—that is a different optimization (often in your bundler or design system).
Use the tool
When to use it on this page
Paste a stylesheet fragment you own or have rights to minify, then use the result in a tested build. Keep the original unminified source in version control; never treat minified text as the source of truth for long-term maintenance. If your site uses PostCSS, Tailwind, or a framework build, prefer your project’s minifier to avoid format mismatches.
Watch-outs
Some advanced CSS can be sensitive to transforms if the minifier is naive. If something breaks, compare a small before/after and adjust your build settings.