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

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cssnano is a modular minifier that aims to utilise small modules from the PostCSS ecosystem, rather than being an all-encompassing module that may be difficult to contribute to. Because it is written on top of PostCSS, it is able to do more than simple whitespace transforms - including advanced optimisations such as custom identifier reduction, z-index rebasing, and adjacent selector merging.

Note that cssnano enables aggressive optimisations by default, which might not always be what you want. Set to true if you want to disable this. In future versions, only safe options will be enabled by default, starting from version 4.

For further details check out the website:

You can now try cssnano online via Runkit!




Please help to support this project by purchasing a cssnano sticker.


MIT © Ben Briggs