Why should I minify CSS?

Minified CSS is smaller in file size, which reduces page load time and improves Core Web Vitals scores. A typical stylesheet shrinks 20–60% after minification.

Does minifying CSS break anything?

No — minification only removes whitespace and comments. The CSS still behaves identically. Always test on a staging environment before deploying to production.

What is the difference between CSS minification and compression?

Minification removes unnecessary characters from the source code. Compression (like gzip) is applied by the web server to reduce transfer size further. Both are complementary and can be used together.

Can I unminify (beautify) CSS?

Yes. Click Beautify above to expand minified CSS into readable, indented code — useful when you need to edit a minified stylesheet.

CSS Minifier

Minify CSS code — remove whitespace and reduce file size

Runs locally in your browser🆓Free — no sign-up🔒100% Private

CSS files in development are written for human readability — with indentation, whitespace between rules, explanatory comments, and blank lines separating sections. In production, all of this whitespace is wasted bandwidth delivered on every page load. Minification removes every unnecessary character without changing how the styles render, typically reducing CSS file size by 30-70%. Smaller CSS files load faster, particularly on mobile connections, and positively impact Core Web Vitals scores that influence Google search rankings. This CSS minifier processes your complete stylesheet instantly and outputs production-ready minified CSS you can deploy directly to your CDN, build pipeline, or static file server. Consider a few common scenarios where this tool proves immediately useful. A freelance developer finishing a client website pastes in a hand-written stylesheet and shaves 15 kilobytes off the download before handing over the files. A WordPress theme author minifies their bundled CSS before releasing a new version to the plugin marketplace, ensuring end-user page loads stay lean without maintaining a separate build step. A front-end engineer troubleshooting a staging environment needs a quick minified version of a patched stylesheet without firing up a full webpack build — they paste, copy, and deploy in seconds. Front-end developers, web designers, and site performance engineers benefit most from this tool, especially those working outside complex build systems or needing a fast one-off optimization without touching project configuration. It is equally valuable for developers maintaining legacy codebases where automated minification was never set up, and for anyone who wants to verify the minified output of a single file before committing it to version control. All processing happens entirely in your browser — your CSS is never uploaded to any server, which matters when stylesheets contain proprietary design tokens, internal brand variables, or unreleased product styles. Paste your stylesheet, click minify, and the compressed output is ready to use immediately.

Input CSS:

How to use CSS Minifier

1.Paste your CSS code into the input panel.
2.Click 'Minify' to remove all whitespace, comments, and redundant characters.
3.See the original vs. minified file size comparison to confirm how much you saved.
4.Click 'Beautify' to go the other way — expand minified CSS back to readable, indented code.
5.Click 'Copy' to copy the minified CSS for use in your production stylesheet or build pipeline.

Key Features

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Remove whitespace and comments — Strips all unnecessary whitespace, newlines, and CSS comments from your stylesheet.

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Size comparison — Original vs. minified file size is shown so you can see exactly how much you saved.

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Beautify mode — Expand minified or poorly formatted CSS back into readable indented code.

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Instant processing — Minification is applied immediately — works on stylesheets of any size.

Frequently Asked Questions about CSS Minifier

Paste your CSS into the input above and click Minify. The tool removes whitespace, comments, and redundant characters. Copy the minified output or download it.