What is CSS minification?

CSS minification removes all unnecessary characters from CSS code without changing its functionality — whitespace, comments, newlines and redundant semicolons are stripped. The result is a smaller file that loads faster.

How much smaller will my CSS get?

Typical CSS files see a 20–40% size reduction after minification. Files with many comments and consistent formatting see the largest improvements.

Does minification change how my CSS works?

No. Minification is purely cosmetic — it removes whitespace and comments that browsers ignore anyway. The rendered output of your website is identical.

Should I minify CSS in production?

Yes — always minify CSS for production. Smaller files mean faster downloads, better Core Web Vitals scores, and improved SEO rankings. Most build tools like Webpack, Vite and Parcel do this automatically.

Can I reverse minified CSS?

Not perfectly — comments and original formatting are lost forever. You should always keep your original unminified source files and minify as a build step.

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CSS Minifier

Minify CSS to reduce file size and improve page load speed — free, instant, no login.

✓ Free✓ No Login✓ Removes Comments✓ Removes Whitespace✓ Shows Size Savings

CSS Input

🗜️ What Gets Removed

✕/* Comments */

✕Extra whitespace

✕Newlines and tabs

✕Spaces around { } : ; ,

✕Last semicolons in blocks

✕Empty rules

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PursTech Pro

File upload, batch minify, API access

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📖 How to Use the CSS Minifier

Paste Your CSS

Copy your CSS from your editor or stylesheet and paste it into the input box. Click Load Sample to see an example.

Click Minify

Click the Minify CSS button. Comments, whitespace and unnecessary characters are removed instantly.

Copy or Download

Copy the minified output to clipboard or download directly as styles.min.css. Size saving percentage shown — typically 20–40%.