Unused CSS is an online tool to remove unused CSS rules. It will check your pages, find unused CSS and let you download a clean CSS file.
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
StyleURL is the easiest way for developers & designers to collaborate on CSS changes. Make your CSS changes in Chrome and StyleURL exports them directly.
It's stored in a Gist on GitHub, so that you can share and make changes easily. StyleURL also generates links which load your CSS changes into existing webpages automatically.