CSS Formatter & Minifier
Last updated: June 14, 2026Beautify or minify CSS.
CSS Formatter & Minifier is a free online tool to beautify or minify CSS. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use CSS Formatter & Minifier
The CSS Formatter & Minifier beautifies messy CSS into clean, readable code with proper indentation, or minifies it for production to cut file size. It runs entirely in your browser — fast and private.
Read the full guide: How to Format CSS Online: Beautify or Minify (Free)
- 1Paste your CSS.
- 2Click Beautify to format, or Minify to compress.
- 3Copy the result.
Beautify or minify
Make CSS readable for editing, or tiny for production, in one tool.
Private
Your CSS is processed on your device — nothing is uploaded.
Free
No watermark and no sign-up.
Clean up minified CSS from DevTools
Copied a compressed stylesheet out of a browser's Network tab or a built .min.css file and got one unreadable line? Paste it here and hit Beautify. It rebuilds proper line breaks and 2-space indentation so you can actually read the selectors, trace a rule, and understand a third-party theme before borrowing or overriding any of it.
Shrink CSS before production deploy
Shipping a static site or a small widget without a build step like Webpack or Vite? Paste your finished stylesheet and click Minify. It strips comments and collapses whitespace around braces, colons and semicolons, cutting bytes so the file downloads faster. Render output stays identical, since only spacing changes — values and rules are untouched.
Reformat AI-generated or pasted CSS
CSS pasted from ChatGPT, a Stack Overflow answer, or a teammate's Slack message often arrives with inconsistent indentation and crammed-together rules. Drop it in and Beautify to normalize every block to clean, consistent 2-space formatting before you commit it. Everything runs in your browser, so unreleased snippets never leave your machine or get uploaded anywhere.
CSS Formatter & Minifier — frequently asked questions
What does minifying CSS do?
It removes comments and unnecessary whitespace so the file downloads faster, without changing how the styles render.
Will formatting change my styles?
No — beautifying and minifying only change spacing and layout, never the actual rules or values.
Is my CSS uploaded?
No — it's processed entirely in your browser.
Is it free?
Yes, completely free.
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Send it to someone who needs it or save the link for later.