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CSS Minifier / Formatter

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Minify or format CSS live, with an instant byte-size reduction percentage — /*! license */ comments always survive minification, and declaration order is never changed.

How it works

  1. Paste your CSS
  2. Pick Minify (compress for production) or Format (re-indent for readability)
  3. The result updates live below — no button, with a size-reduction percentage shown in Minify mode

Frequently asked questions

Does it strip license comments?

No — comments starting with /*! are preserved through minification, following the same convention used by tools like YUI Compressor and CSSO. Only ordinary comments are removed.

Does it reorder my declarations?

Never. Some minifiers offer alphabetical sorting, which can change which value wins when a property is duplicated — this tool never reorders anything.

Does this update live?

Yes, no button to click.

#CssMinifier#CssMinifierPreservesLicenseComment#CssMinifierNoReorderDeclarations#CssMinifierLiveNoButton

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From the blog

Some CSS minifiers offer to alphabetize your declarations. That can silently change which style wins. Ours never touches the order.
dev

Some CSS minifiers offer to alphabetize your declarations. That can silently change which style wins. Ours never touches the order.

A declaration-sorting feature sounds harmless until you have a duplicated property relying on cascade order — then it can flip which value actually applies. We also checked a popular minifier that needs a button click. Ours is live, keeps your declaration order exactly as written, and preserves /*! license */ comments the way YUI Compressor and CSSO do.

2026-08-29

Update history

  • 2026-08-30 Added: a cover image — used as the card thumbnail, social share image, and blog title image.
  • 2026-08-29 Launched: live CSS minify/format (no button), byte-size reduction percentage, /*! license */ comments preserved through minification, declaration order never changed.