CSS Minifier
Runs in your browser — your data is never uploaded.
Shrink a CSS file by stripping comments and unnecessary whitespace, while leaving quoted strings and url() values completely untouched. Runs entirely in your browser, so proprietary stylesheets never leave your device.
0 characters · runs entirely in your browser
How to use CSS Minifier
- 1
Paste your CSS into the box.
- 2
Click “Minify”.
- 3
Copy the result, or download it as a .css file.
Share
Embed this tool on your site
Paste this where you want the tool to appear. It runs entirely in your visitor's browser — no uploads, no account, no tracking.
Please keep the attribution line — it's what keeps these tools free.
Need a different size, a dark theme, or a different tool? Build an embed lets you preview it first.
Frequently asked questions
How much smaller will my CSS get?+
It depends on how much whitespace and how many comments the file carries — hand-written, well-commented stylesheets often shrink 20–40%, while already-compact CSS changes little. The savings come purely from removing characters the browser ignores.
Is it safe for CSS containing quoted content, like `content: "a b"`?+
Yes. The minifier tracks quoted strings and url() contents and never alters whitespace inside them — only the surrounding selectors and declarations are compacted.
Does it remove comments?+
Yes, all `/* ... */` comments are stripped, since they add size with no effect on rendering.
Is my CSS uploaded anywhere?+
No. Minification runs entirely in your browser — nothing is sent to a server.