CSS Minifier
Minify CSS in your browser — strip comments and whitespace to shrink file size for faster page loads. Free.
Minify CSS
Paste CSS to strip comments and whitespace and shrink the file.
Features
Common use cases
- 1Shrinking a stylesheet
- 2Reducing page weight
- 3Inlining critical CSS
- 4Quick pre-deploy minify
- 5Cleaning hand-written CSS
- 6Comparing before/after size
Related tools
About CSS minification
Minifying CSS removes everything a browser doesn't need — comments, whitespace and redundant characters — to reduce file size and speed up page loads.
This is a conservative minifier: it strips comments and collapses whitespace safely. For a production build pipeline you may prefer a full optimiser (like cssnano) that also merges rules and shortens values, but for a quick shrink this runs instantly in your browser with nothing uploaded.
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Got Questions? We Have Answers.
What does it remove?
Comments, unnecessary whitespace and line breaks, producing compact CSS that loads faster while rendering identically.
Is my CSS uploaded?
No. Minification runs entirely in your browser.
Is it safe for production?
It is a lightweight minifier good for quick wins. For a full build pipeline, use a dedicated tool like cssnano for maximum compression.
Why minify CSS?
Smaller CSS means less to download and parse, improving page speed and Core Web Vitals — especially on mobile.