PurifyCSS Online

Remove unused CSS code from your stylesheets

Paste your website URL and instantly find out how much CSS you can remove. Works with any website, WordPress, Bootstrap, custom builds.

Instant Analysis Works with Any Site 100% Free

What can you use it for?

My WordPress site loads slowly, is it the CSS?

WordPress themes and page builders bundle massive CSS frameworks. Most sites use less than 20% of their stylesheets, the rest is dead weight slowing down every page load.

Paste your URL and instantly see which CSS rules are unused. Download a clean, minified version and drop it into your theme. No plugins, no build tools needed.

How do I improve my Core Web Vitals score?

Large, unused CSS blocks rendering and hurts your Largest Contentful Paint. Google penalizes pages that ship bloated stylesheets, pushing you down in search results.

Run your site through PurifyCSS to identify exactly how much CSS is wasted. Remove the unused rules and watch your performance scores climb.

How can I clean up CSS without setting up a build tool?

Tools like PurgeCSS and UnCSS need npm, Webpack, or PostCSS pipelines. If you work with a CMS or don't use a build system, they're not an option.

Just paste a URL. No installation, no configuration, no command line. Results in seconds, directly in your browser.

Can I audit CSS coverage across multiple pages at once?

Testing a single page misses CSS rules that are used on subpages. Single-page analysis can lead to false positives and accidentally removing styles you actually need.

Add multiple URLs to check CSS usage across your entire site. Get combined results that account for every page, so nothing important gets removed.