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Free online css minifier tool. No signup required. Use instantly in your browser.
Minify your CSS by removing comments, whitespace, and unnecessary characters. See exactly how much size you save. Works entirely in your browser — nothing is sent to any server.
■ Minification typically saves 20-40% file size on well-formatted CSS
■ Combine with gzip compression on your server for 70-90% total reduction
■ Use CSS custom properties (variables) to reduce repetition before minifying
■ Remove unused CSS with tools like PurgeCSS for even bigger savings
■ Consider CSS-in-JS or utility-first (Tailwind) to eliminate dead code at build time
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