CSS Compressor: Minify CSS Online for Faster Pages
Use our free CSS compressor to reduce stylesheet size quickly. Smaller CSS files load faster,
improve Core Web Vitals, and lower bandwidth. Paste your code or upload a file, choose a compression level,
and download clean, production‑ready CSS.
Why compress CSS?
Minification removes comments and unnecessary whitespace without changing how your site looks. It boosts
performance and SEO by cutting transfer sizes and speeding up render times on desktop and mobile.
How to use this CSS compressor
Upload a `.css` file or paste CSS into the editor.
Select a level: Readable, Balanced, Aggressive, or Extreme.
Click Compress CSS and review the result in the output editor.
Copy or download the minified CSS to deploy.
Best practices and tips
Keep original files and source maps for debugging.
Test Advanced mode on staging to catch edge cases.
Combine minified CSS with HTTP caching and a CDN.
Use critical CSS for above‑the‑fold content.
Frequently asked questions
Is CSS compression safe?
Yes. Readable and Balanced levels remove comments and unnecessary whitespace only. Aggressive and Extreme
apply tighter formatting to achieve smaller files. For complex pipelines, always test before production.
What’s the difference between the four levels?
Readable keeps spacing for legibility, Balanced safely minifies, Aggressive removes extra characters,
and Extreme targets the smallest output. Pick the level that fits your deployment and QA process.
Do you store my CSS?
No. We process your input to generate a downloadable result and do not retain your files on our servers.