Purgecss

In plain words

PurgeCSS is a tool that removes unused CSS selectors from stylesheets, reducing file size. It's designed for developers building websites with CSS frameworks like Bootstrap or Tailwind CSS, where entire frameworks are often included despite only partial usage. The tool analyzes code to identify which styles are actually used and strips out the rest, resulting in significantly smaller CSS files suitable for production deployment.

written from the facts on this page · September 2026

From the sources

When you are building a website with a css framework like Bootstrap, you will only use a part of the framework and unused css styles will be included. Purgecss removes unused selectors from your css, resulting in smaller files. "With PurgeCSS, you'll have a hard time generating CSS that isn't under 10kb minified and gzipped." - Tailwindcss docs

PurgeCSS is a tool to remove unused CSS from your project

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  Unused CSS2018 · unused-css.com · ▲307

  Easily find and remove unused CSS rules

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  Unused CSS finder2018 · jitbit.com · ▲299

  Crawl your website and find unused CSS

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  DropCSS – A simple, thorough and fast unused-CSS cleaner2019 · github.com · ▲134

  An exceptionally fast, thorough and tiny unused-CSS cleaner - leeoniya/dropcss

• 
  Remove unused css with Purgecss2017 · github.com · ▲8

  Remove unused CSS. Contribute to FullHuman/purgecss development by creating an account on GitHub.

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  CSSelf2014 · csself.com · ▲112

  Clean your CSS files of unused stuff

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  Water.css – A just-add-css collection of styles to make websites nicer2019 · github.com · ▲501

  A drop-in collection of CSS styles to make simple websites just a little nicer - kognise/water.css

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