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cssnano Overview

A modular minifier, built on top of the PostCSS ecosystem

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! Optimizations range from compressing colors & removing comments, to discarding overridden at-rules, normalizing 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.

Additional Details for cssnano

Programming Language

JavaScript

Registered

2022-06-16

Last Updated

2026-06-11

Maintainers

sf-editor1

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