CSS Beautifier & Minifier
FREEPaste your CSS and choose what you need. Beautify turns messy or minified code into clean, readable CSS with the indentation and brace style you prefer. Minify squeezes it down for production and shows you how much you saved. It runs in your browser and it's free.
How to Use the CSS Beautifier & Minifier
1. Paste your CSS into the input box.
2. Choose Beautify to format the code, or Minify to compress it.
3. For Beautify, pick your indentation (2, 3 or 4 spaces, or tabs) and your brace style.
4. For Minify, switch on source map generation if you want to keep production debugging possible.
5. Check the before and after character count and file size.
6. Copy the result or download it.
Beautify or Minify: Which Do You Need?
| Beautify | Minify | |
| What it does | Adds indentation, line breaks and consistent spacing. | Removes characters the browser doesn't need. |
| Use it when | You're writing, debugging, or reviewing CSS. | You're about to deploy to production. |
| Result | Readable code that's easy to edit. | A smaller file that loads faster. |
The usual routine is to keep beautified CSS as your source and minify only the version you ship.
What Minifying CSS Does
Minifying typically strips whitespace, line breaks and comments, along with other characters that CSS doesn't need. The styles should render the same, because the rules, selectors and values are unchanged. This tool keeps comments marked as important (those starting with /*!), and it preserves CSS hacks and vendor prefixes such as -webkit- and -moz-, which matters if you still support older browsers.
Savings vary a lot from file to file, depending on how much whitespace and commenting your original had. The before and after statistics show your actual numbers.
What Beautifying CSS Does
Beautifying takes CSS that is compressed, copied from a minified file, or just inconsistently written, and gives it a clear structure. Each rule and declaration goes on its own line, indentation is consistent, and your chosen brace style is applied throughout. It's the quickest way to read a third-party stylesheet or tidy code before a review.
CSS in Your HTML and CSS Workflow
When you design and build websites with HTML and CSS, the two work side by side. HTML provides the structure, and CSS controls how it looks. Your HTML pages usually link to one or more stylesheets, so the readability and size of those files affect both how easy your project is to maintain and how quickly pages load.
If you're starting to learn HTML and CSS, the beautifier is a handy way to study real code. Paste a stylesheet from a site you admire, and the formatted version shows how its rules are organized. Once you're shipping your own pages, run your final stylesheet through the minifier before deploying.
Working on the markup or scripts as well? The HTML Beautifier & Minifier and the JavaScript Beautifier & Minifier on this site do the same job for those languages.
Beautifying Responsive Design CSS
Responsive stylesheets can get long, with a base set of rules followed by media queries for different screen sizes. Beautifying makes that structure easier to scan, so you can see which rules apply at each breakpoint and spot a conflicting or duplicated declaration. The tool only changes formatting. It doesn't make a design responsive, and your styles are not altered.
Source Maps: Debugging Minified CSS
A minified stylesheet is usually one long line, which is hard to inspect in your browser's developer tools. A source map links the minified file back to your original code, so the tools can show readable rules with their original line numbers. If you minify for production, generating a source map alongside it keeps live debugging practical.
Minification and GZIP or Brotli Compression
Minifying and server compression do different jobs, and they work well together. Minifying shrinks the file itself. GZIP or Brotli then compress what's sent over the network. Minifying alone isn't a full performance fix, so enable server compression too.
Common Mistakes to Avoid
❌ When Beautifying and Minifying CSS
✓ Solution:
• Minifying while you're still developing. Minified CSS is very hard to debug. Work on beautified code and minify as the last step before deployment.
• Using a minifier that damages hacks or prefixes. Older-browser fixes and vendor-prefixed properties can break if a minifier handles them badly. Choose one that preserves them.
• Leaving out source maps in production. Without one, tracking down a styling problem on a live site is much harder.
• Letting formatting differ across a team. Mixed indentation and brace styles clutter version-control diffs and slow down code reviews. Agree on shared settings.
• Treating minification as the whole optimization. Pair it with server compression for a bigger effect.
Frequently Asked Questions
It's a tool that does two opposite jobs on a stylesheet: formatting messy CSS so it's readable, and compressing clean CSS so it's smaller.
Beautifying adds indentation and line breaks for people to read. Minifying removes unnecessary characters for browsers to download faster. Use the first while developing and the second before you deploy.
It shouldn't. Minification removes characters browsers ignore and leaves your rules and values alone. This tool preserves CSS hacks and vendor prefixes. It's still sensible to check the minified output in the browsers you support before shipping.
Indentation can be 2, 3 or 4 spaces, or tabs. You can also choose a brace style.
A source map connects minified code to your original source, so browser developer tools can show readable rules and line numbers while debugging.
Indirectly, at best. Smaller files can load faster, which supports a better page experience, but it's not a ranking guarantee.
Yes. Beautifying a stylesheet makes it far easier to follow how the rules are organized. The tool formats code but doesn't teach you the language, so pair it with a tutorial.
It formats and minifies any CSS, including media queries. It doesn't change your styles or make a layout responsive.
No, this tool handles CSS. For scripts, use the JavaScript Beautifier & Minifier on this site.
No. Processing happens in your browser.
Beautify or Minify Your CSS
Paste your stylesheet into the box above, choose whether you want to clean up your code or compress it for production, and copy your ready-to-use result instantly.
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