CSS Minifier
Compress your stylesheets by removing comments, whitespace and redundant syntax. See exact size savings before and after.
Runs 100% in your browser — nothing is ever uploaded.
What is CSS Minifier?
Minify CSS online: strip comments, whitespace and redundancies to shrink your stylesheets. See size savings instantly. Free, no upload, no sign-up. Paste your content, get an instant result, and copy or download the output with a single click. Free and unlimited, with no watermarks and no registration — all processing happens right in your browser, so nothing is ever sent to a server.
How to use CSS Minifier
- Open CSS Minifier — it loads instantly and needs no sign-up.
- Paste or type your input into the editor (or press Sample to try an example).
- Adjust the available options if needed and press the action button.
- Copy the result with one click or download it as a file.
Frequently asked questions
Is CSS Minifier really free?
Yes — CSS Minifier is 100% free with no limits, no watermarks and no registration. You can use it as often as you like, on as many files or inputs as you need.
Is my data safe when I use CSS Minifier?
Absolutely. CSS Minifier runs entirely in your browser using JavaScript — your input is processed on your own device and is never uploaded to any server.
Does CSS Minifier work on mobile devices?
Yes. CSS Minifier works in any modern browser on desktop, tablet and mobile (Chrome, Firefox, Safari, Edge) — there is no app to install.
Is my code uploaded to a server?
Never. Every CodeKit tool runs entirely in your browser with JavaScript. Your code is processed on your device and never touches a network — it even works offline once the page is loaded.
Are these tools really free?
Yes — 100% free, no sign-up, no limits, no watermarks. We keep the site running with minimal, non-intrusive ads.
Is there a file or size limit?
No hard limit. Because processing happens on your machine, the only constraint is your device’s memory. Files of several megabytes work fine.