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CSS Minifier: Shrink Your Stylesheets for Faster Sites

9 min read

Large CSS files slow down page loads. A CSS minifier strips comments and unnecessary whitespace so your stylesheet is smaller while behaving the same. Use it in production to improve performance.

What gets removed

  • Comments: All /* ... */ comments are removed.
  • Whitespace: Spaces, tabs, and newlines are collapsed where safe.
  • Nothing else: Selectors, properties, and values stay unchanged. No renaming of classes or variables.

When to minify

  • Production: Minify CSS as part of your build or before deploy.
  • Themes and plugins: Ship a minified version for faster load.
  • Development: Keep full formatting while you work; minify only for release.

Combined with gzip or Brotli, minified CSS can significantly reduce transfer size. Our CSS Minifier runs in your browser—paste your CSS and copy the minified result. Your code never leaves your device.

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