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CSS Minifier

Developer

Minify CSS code to reduce file size. Remove whitespace, comments, and optimize for production.

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Stripping whitespace and comments is the obvious part of minifying CSS, but the specific size gains come from elsewhere, shortening a color value like #ffffff down to #fff, dropping a unit off a zero value since 0px and 0 render identically, and combining separate margin or padding properties into a single shorthand line, optimizations a naive whitespace-only stripper never catches. This tool minifies CSS by removing whitespace and comments while also applying these CSS-specific size reductions, rather than only stripping formatting.

See more about the CSS Minifier

Useful for shrinking a stylesheet for production beyond what basic whitespace removal alone achieves, shortening color values and zero units automatically instead of hunting for them by hand, or minifying CSS with shorthand property optimization included rather than left for a separate pass.

Key features

  • Clean interface
  • Fast processing
  • No signup required
  • Works offline

Quick answers for CSS Minifier

What does minifying actually remove?
Comments, unnecessary whitespace and line breaks, and it shortens repeated-pair 6-digit hex colors like #ffffff to their 3-digit form (#fff).
Can I see how much smaller the file gets?
Yes, the tool shows the original and minified byte counts along with the percentage saved.
Does it check my CSS for errors first?
No, it only compresses whatever you paste in without validating it, use the separate CSS Validator tool for syntax checking.