CSS Minifier & Beautifier

A CSS minifier removes unnecessary characters from CSS code — comments, whitespace, newlines, and redundant semicolons — to reduce file size. This makes your stylesheet load faster, improving website performance and Core Web Vitals scores. Our tool typically reduces CSS file size by 20-40%.

Yes, CSS minification is safe. It only removes characters that don't affect how the browser interprets the CSS: whitespace, comments, and trailing semicolons. The rendered result is identical. However, always keep your unminified source files for development and minify only for production.

Minify compresses CSS into the smallest possible size by removing all unnecessary whitespace and comments — ideal for production. Beautify does the opposite: it formats CSS with proper indentation, line breaks, and spacing — ideal for reading and editing. This tool does both.

No. This tool runs entirely in your browser using JavaScript. Your CSS code never leaves your device — there are no server requests, no uploads, and no data storage. It's completely private and works offline too.

Typical CSS minification reduces file size by 20-40%, depending on the original formatting. CSS with lots of comments and whitespace can see reductions of 50% or more. The tool shows the exact before/after sizes and percentage saved.

For production builds, we recommend using build tools like PostCSS, cssnano, or your bundler's built-in minification (Webpack, Vite, esbuild). This online tool is perfect for quick one-off minification, testing, debugging, or when you don't have a build pipeline set up.