CSS Minifier
Remove comments and unnecessary whitespace from CSS and see how many bytes you saved. Runs entirely in the tab.
Good to know
- A conservative minifier: it does not remove unused rules or rewrite values. Always re-test the stylesheet afterwards.
Common questions
Does it remove unused CSS rules?
No. It removes comments and redundant whitespace. Unused-rule detection needs a full page audit.
Why did calc() stop working after minifying?
Spaces around + and - inside calc() are required by the CSS specification. Re-test the stylesheet after minifying.
Can it minify SCSS or LESS?
No. It expects plain CSS; preprocessors have their own build steps.
Is this tool really free?
Yes. There is no account, no paywall and no usage limit. Tools App is funded by aumenso, the studio behind it.
Is anything I enter uploaded?
No. The tool runs in your browser tab; what you enter is never sent to us and never stored.
Need this built for your business?
aumenso builds websites, branding, SEO, GoHighLevel funnels and custom software for agencies and businesses across North America and Europe. These tools are the same team's work, given away free.