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CSS Minifier

CSS

Minify and beautify CSS

Works both directions: paste readable CSS to minify it before shipping, or paste an unreadable production bundle to beautify it back into something you can actually debug. Minification here only strips whitespace, comments, and redundant characters. Selectors, specificity, and values stay exactly as they were, so behavior is guaranteed identical, and it's a good way to estimate size savings before wiring up a real build-step minifier. It handles plain CSS only, not SCSS or LESS source, so preprocessor files need to be compiled first. For a one-off cleanup this is fine, but a real production pipeline should still use a build-integrated minifier like cssnano via PostCSS so minification happens automatically and consistently on every build rather than manually.

cssminifyformat

How to use CSS Minifier

  • 1.Paste readable CSS and minify it to strip whitespace and comments before shipping it to production.
  • 2.Paste minified, unreadable CSS from a production bundle and beautify it to actually debug or read it.
  • 3.Use it to quickly estimate file-size savings from minification before wiring up a build-step minifier.

Frequently asked questions

Does minifying change how the CSS behaves?
No — minification only removes whitespace, comments, and redundant characters; it doesn't change selectors, specificity, or property values, so behavior stays identical.
Is my CSS sent to a server?
No, both minifying and beautifying run entirely in your browser.
Does it support SCSS/LESS syntax?
No, this handles plain CSS only — compile SCSS/LESS to CSS first with your preprocessor before pasting it here.
Should I use this instead of a build-tool minifier like cssnano?
This is great for a quick one-off, but for a real production pipeline you should use a build-integrated minifier (e.g. cssnano via PostCSS) so minification is automatic and consistent on every build.

Use via API, SDK, or MCP

cURL# Free: 1,000 req/day · Pro: 10,000 req/day
curl -X POST https://api.utilix.tech/v1/tools/css-minifier \
  -H "Authorization: Bearer utx_live_..." \
  -H "Content-Type: application/json" \
  -d '{"input":"body { color: red; /* primary */ }"}'

Get an API key from your dashboard · Full API docs →

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