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CSS Minifier

Minify CSS by removing whitespace and comments.

Minify CSS by removing whitespace and comments.

Quick start: Paste your CSS source code into the input area. → Click 'Minify' to remove all unnecessary whitespace, line breaks, and comments. → Review the minified output and the percentage reduction in size.

How to use CSS Minifier

  1. 1

    Paste your CSS source code into the input area.

  2. 2

    Click 'Minify' to remove all unnecessary whitespace, line breaks, and comments.

  3. 3

    Review the minified output and the percentage reduction in size.

  4. 4

    Copy the compressed CSS with one click, ready for production deployment.

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Why use CSS Minifier?

  • Removes all unnecessary whitespace, line breaks, and comments for the smallest possible output.
  • Preserves /*! important comments that are marked as license or legal notices.
  • Shows the size reduction percentage so you can quantify the savings.
  • Runs entirely in your browser — no source code is sent to any server.

Common use cases

  • Compress CSS before deploying to production to reduce page load times.
  • Minify inline CSS for email templates where every byte counts.
  • Shrink third-party CSS that was not provided in a minified version.
  • Reduce the size of CSS bundles for performance-critical landing pages.

About CSS Minifier

Every unnecessary byte in a CSS file adds to page load time. Xevon Tools' CSS Minifier strips whitespace, line breaks, and comments from your stylesheets to produce the smallest possible output for production deployment. Important comments marked with /*! are preserved, which is the standard convention for license notices. The tool shows the original and minified sizes alongside the percentage reduction so you can quantify the improvement. This is especially valuable for inline CSS in email templates, for third-party stylesheets that were not provided minified, and for quick production optimization when a full build pipeline is not available. Everything runs in your browser, so proprietary CSS stays private. For the inverse operation, use the CSS Beautifier to expand minified code back to readable format.

Frequently asked questions

Yes. Comments starting with /*! are preserved in the output, which is the standard convention for license notices and legal attributions that must remain in production code.
Typical savings are 20-40% depending on how much whitespace and commenting the original contains. Heavily commented code with verbose formatting sees the largest reductions.
The tool performs whitespace and comment removal only. It does not merge selectors, shorten color values, or restructure rules. For advanced optimization, use a build tool like cssnano.
Yes. Use the companion CSS Beautifier tool to expand minified CSS into readable, properly indented format.

Your files never leave your device

Every tool on Xevon Tools runs 100% in your browser. No uploads, no servers, no tracking. Free forever.

Learn more

Embed CSS Minifier on your site

Add this tool to your own website, blog, or internal tool page with one line of code. Free to use, no attribution required (but appreciated).

<iframe src="https://www.xevontools.com/embed/minify-css" width="100%" height="640" style="border:1px solid #e2e8f0;border-radius:12px;" title="CSS Minifier — Xevon Tools"></iframe>
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