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Paste any stylesheet and squeeze the air out of it: comments disappear, whitespace collapses, the final semicolon before a closing brace is dropped and 0px becomes 0. Quoted strings and url() values are protected from all of it. The report shows original size, minified size and savings in real bytes — and the whole run happens locally in your browser.
🔒 100% private: everything runs inside your browser — nothing is uploaded, stored or logged.
Quoted strings — content: "a b" — and url() values are lifted out before minification, so their exact spacing survives.
Zero lengths lose their unit (0px → 0) and the final semicolon before } is dropped — both are standards-safe.
Spaces around braces, colons and semicolons vanish; the required space after @media is kept so media queries stay valid.
Savings are measured in real UTF-8 bytes so you know exactly what the network will save.
Plain JavaScript in your browser — nothing is uploaded, stored or logged.
Input & output. Any CSS works — plain stylesheets, preprocessor output, print and media queries. Output is one compact line; paste it back through a formatter if you need to edit it again. For stylesheets with source maps or license headers, keep a comment banner in your build step instead — it will be removed here.
This is a safe text-level minifier, not a full CSS parser: it does not merge duplicate selectors, reorder rules, autoprefix properties or convert colors. Chunks it doesn't understand are left alone. Because of that, savings are smaller than an AST-based tool would achieve — but the risk of changing what your design looks like is close to zero.
No — that is the point of the safe pipeline. Only comments, whitespace, the last semicolon and zero-length units are touched; selectors, declarations and values keep their meaning.
@media(max-width:…) is invalid CSS — the spec requires whitespace between the at-rule and its query. The minifier keeps that space so your media queries stay valid.
No. That requires a full parser and can change the cascade. This tool stays text-level and safe; use a build-time tool like cssnano for advanced optimization.
Yes. Quoted strings and url() contents are extracted before minification and restored untouched — spacing inside them matters.
No. Everything runs locally in your browser; the tool works even with your network disconnected.
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Pack images into sprite sheets to cut HTTP requests.
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Convert images to and from the WebP format directly in your browser.
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On mobile?
This tool runs in any mobile browser — no app needed. And for the image & PDF side of the toolbox, the CompressoPanda Android app ships 36 tools that run with no connection at all: compression to target size, editing and PDF essentials included.