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CSS Minifier

Minify and compress CSS code instantly online. Remove whitespace, comments, and redundant code to reduce CSS file size and improve page load speed.

Used 23.5K times today

How to Use CSS Minifier

  1. 1

    Paste your CSS

    Copy your stylesheet or CSS snippet and paste it into the input field.

  2. 2

    Click Minify

    Hit the "Minify" button to remove all comments, whitespace, and unnecessary characters.

  3. 3

    Copy the minified CSS

    Copy the compressed output and use it in your production build or inline styles.

Frequently Asked Questions

Does minification affect how the CSS works?
No. Minification only removes whitespace, comments, and redundant characters. The computed styles applied by the browser are identical to the original.
How much can CSS minification reduce file size?
Typical CSS files see 20–40% reduction from minification alone. Combining minification with gzip compression can achieve 70–85% total size reduction.
Does it optimise properties or just remove whitespace?
This tool focuses on whitespace and comment removal. For advanced optimisations like shorthand property merging, consider PostCSS plugins in your build pipeline.

About CSS Minifier

The CSS Minifier compresses your stylesheets by stripping comments, whitespace, and newlines to produce the smallest possible CSS file. Reducing CSS payload size directly improves page load performance, reduces bandwidth consumption, and contributes to better Core Web Vitals scores — all of which affect SEO rankings and user experience.

This tool is ideal for quick one-off minification of individual stylesheets or components. For systematic minification in a build pipeline, consider integrating a tool like cssnano or Lightning CSS. Use our Diff Checker to verify that minification has not introduced any unintended changes.

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