Can I minify a single CSS rule?

Yes. The minifier works on any amount of CSS, including a single selector and its declarations.

Does the tool work on CSS-in-JS strings?

Yes. If your CSS-in-JS uses standard CSS syntax, you can paste the CSS string, minify it, and embed the result.

What happens to CSS comments after minification?

All comments are removed. If you need to preserve a specific comment (like a license notice), add it back manually above the minified output.

Browse tools

Free · Fast · Privacy-first

Minify CSS Code Online

Whether you are minifying a single CSS rule or an entire stylesheet, FixTools handles both instantly. Paste any amount of CSS code and get a compacted, deployment-ready output — no configuration, no file uploads, no waiting.

⚡ Use Tool Now How it works

Cost: Free forever
Sign-up: Not required
Processing: In your browser
Privacy: Files stay local

⚡

Minifies CSS code of any length

🔒

Works on snippets, components, and full files

✨

Handles inline styles and at-rule blocks

CSS Tool

Minify CSS

All processing happens in your browser — your files are never uploaded to any server.

🚀Open Minify CSS

100% Free · No account · Works on any device

How to use this tool

💡

Paste any CSS code — from a single selector to a full stylesheet — and click Minify. The output is ready to copy directly into your HTML, JS, or CSS file.

How It Works

Step-by-step guide to minify css code online:

1
Paste your CSS code
Paste the CSS code you want to minify — a snippet, a component block, or a full stylesheet.
2
Click Minify
Click Minify to compress the code.
3
Copy the minified code
Copy the minified output for use in your project.
4
Embed or deploy
Paste the minified CSS into your HTML file, component, or production stylesheet.

When to use this guide

Use this when you want to minify a specific CSS snippet — such as inline styles, a component's styles, or a single at-rule block — rather than an entire file.

Pro tips

Get better results with these expert suggestions:

Minify inline styles before embedding in HTML

If you are using inline styles for critical CSS or email HTML, minify them first. Even small reductions matter in inline contexts where every character is part of the HTML payload.

Minify individual component styles in component-based projects

In React, Vue, or Angular projects with scoped CSS, minify each component's styles independently before bundling. This makes it easier to track file sizes at the component level.

Test minified code in isolation

After minifying a specific block of CSS code, apply it to a test page to confirm it behaves identically to the original. This is especially important for complex selectors and animations.