March 19, 2021

249 words 2 mins read



A modular minifier, built on top of the PostCSS ecosystem.

repo name cssnano/cssnano
repo link
language CSS
size (curr.) 21789 kB
stars (curr.) 3753
created 2015-04-14
license MIT License

A modular minifier, built on top of the PostCSS ecosystem.

Backers on Open Collective Sponsors on Open Collective NPM version Build Status codecov Gitter

cssnano is a modern, modular compression tool written on top of the PostCSS ecosystem, which allows us to use a lot of powerful features in order to compact CSS appropriately.

Our preset system allow you to load cssnano in a different configuration depending on your needs; the default preset performs safe transforms, whereas the advanced preset performs more aggressive transforms that are safe only when your site meets the requirements; but regardless of the preset you choose, we handle more than whitespace transforms!

Optimisations range from compressing colors & removing comments, to discarding overridden at-rules, normalising unicode-range descriptors, even mangling gradient parameters for a smaller output value! In addition, where it’s made sense for a transform, we’ve added Browserslist to provide different output depending on the browsers that you support.

For further details check out the website:

You can now try cssnano online!




This project exists thanks to all the people who contribute. [Contribute].


Thank you to all our backers! 🙏 [Become a backer]


Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [Become a sponsor]


MIT © Ben Briggs

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