CSS Minifier
Compresses CSS by stripping comments and whitespace, collapsing rules onto a single line, and dropping redundant trailing semicolons — while protecting quoted strings and url() values — with a live before-and-after byte size comparison and a one-click copy, useful for shrinking stylesheets, inline styles, and email-safe CSS without changing how they render.
CSS Minifier — Free Online Tool
Compresses CSS by stripping comments and whitespace, collapsing rules onto a single line, and dropping redundant trailing semicolons — while protecting quoted strings and url() values — with a live before-and-after byte size comparison and a one-click copy, useful for shrinking stylesheets, inline styles, and email-safe CSS without changing how they render.
How to use the CSS Minifier
- Open the tool above — it runs entirely in your browser, so your input never leaves this page.
- Paste or type your input into the field, then press the relevant button (e.g. Encode / Decode, Generate, or Convert).
- Copy the result from the output area with the copy button orCtrl/Cmd + C.
- No signup, no upload, and no tracking — repeat as often as you need.
Frequently asked questions
Is the CSS Minifier free to use?
Yes. The CSS Minifier is completely free, with no signup, no ads inside the tool, and no hidden limits.
Does the CSS Minifier upload my data?
No. The CSS Minifier processes everything locally in your browser. Your input is never sent to a server, so it stays private even on shared devices.
Does the CSS Minifier work offline?
After the page loads, the CSS Minifier runs entirely in your browser, so it keeps working without a network connection.
Free & private — why use this CSS Minifier
The CSS Minifier runs 100% client-side in your browser. Your data is never uploaded to a server, no account is required, and the tool is completely free. It works offline once the page has loaded and is part of a growing collection of privacy-first developer utilities.