PostCSS

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PostCSS is a tool for transforming CSS with JavaScript. It can be used to develop a template language such as Sass and LESS. The PostCSS core consists of:

CSS parser that generates anabstract syntax tree

Set of classes that comprises the tree

CSS generator that generates a CSS line for the object tree

Code map generator for the CSS changes made#

There are official tools making it possible to use PostCSS with build systems such asWebpack,Gulp, andGrunt. There is also a console interface available.Browserify or Webpack can be used to open PostCSS in a browser.

The complete plugin list can be found on postcss.parts, with some examples listed below.

Autoprefixer to add and clearbrowser prefixes.

CSS Modules to getCSS selectors isolated and code organized. It is supplied as part of Webpack.

stylelint to analyze CSS code for mistakes and check style consistency.

stylefmt fixes the CSS code according to the stylelint settings.

PreCSS to perform some Sass/Less preprocessing functions.

postcss-preset-env to emulate features from unfinished CSS specification drafts.

cssnano to make CSS smaller in size by getting rid of the spaces and rewriting the code.

RTLCSS to change CSS code so that the design should be suitable for right-to-left writing (such is applied in Arabic and Hebrew).

postcss-assets, postcss-inline-svg and postcss-sprites to work with graphics.

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tailwindlabs /tailwindcss

Star90.5k

A utility-first CSS framework for rapid UI development.

css postcss responsive css-framework functional-css utility-classes tailwindcss

UpdatedOct 7, 2025
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🌼 🌼 🌼 🌼 🌼 The most popular, free and open-source Tailwind CSS component library

css components ui-design design-systems design-pattern component postcss css-framework svelte ui-kit component-library css-components ui-pattern design-system ui-library ui-framework tailwind tailwindcss tailwind-css daisyui

UpdatedOct 7, 2025
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postcss /postcss

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Transforming styles with JS plugins

css parser framework postcss ast

UpdatedSep 15, 2025
TypeScript

aniftyco /awesome-tailwindcss

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😎 Awesome things related to Tailwind CSS

css awesome postcss apps resources websites awesome-list tailwind tailwindcss

UpdatedMay 30, 2025

stylelint /stylelint

Sponsor

Star11.3k

A mighty CSS linter that helps you avoid errors and enforce conventions.

css lint postcss linter enforce-conventions

UpdatedOct 6, 2025
JavaScript

uncss /uncss

Star9.4k

Remove unused styles from CSS

javascript css stylesheets postcss build-tool cleanup uncss unusedcss

UpdatedJun 18, 2024
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FullHuman /purgecss

Star8k

Remove unused CSS

css postcss webpack-plugin rollup-plugin postcss-plugin optimization-tools purgecss

UpdatedOct 7, 2025
TypeScript

fkling /astexplorer

Star6.4k

A web tool to explore the ASTs generated by various parsers.

javascript parser babel postcss ast jscodeshift ast-explorer

UpdatedApr 26, 2024
JavaScript

chakra-ui /panda

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Star5.8k

🐼 Universal, Type-Safe, CSS-in-JS Framework for Design Systems ⚡️

css typescript postcss compiler engine css-in-js atomic-css utility-classes theming framework-agnostic jit-compiler design-tokens design-system styled-system

UpdatedOct 7, 2025
TypeScript

MoOx /postcss-cssnext

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Star5.3k

`postcss-cssnext` has been deprecated in favor of `postcss-preset-env`.

javascript css postcss cssnext postcss-plugins

UpdatedJul 2, 2024
JavaScript

egoist /poi

Sponsor

Star5.2k

⚡A zero-config bundler for JavaScript applications.

react babel vuejs typescript webpack vue preact postcss bundle svelte build-tool

UpdatedDec 6, 2021
JavaScript

cssnano /cssnano

Star4.9k

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

css postcss minification cssnano optimisation

UpdatedSep 18, 2025
CSS

peterramsing /lost

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Star4.5k

LostGrid is a powerful grid system built in PostCSS that works with any preprocessor and even vanilla CSS.

javascript css grid postcss

UpdatedMar 3, 2024
JavaScript

suitcss /suit

Star3.8k

Style tools for UI components

css postcss preprocessor suit-css css-packages

UpdatedMay 29, 2022
HTML

twbs /rfs

Sponsor

Star3.4k

✩ Automates responsive resizing ✩

css sass postcss frontend responsive stylus scss font-size rfs

UpdatedOct 1, 2025
CSS

evrone /postcss-px-to-viewport

Star3.2k

A plugin for PostCSS that generates viewport units (vw, vh, vmin, vmax) from pixel units. The best choice to create a scalable interface on different displays by one design size.

postcss media-queries rem-units pixel-units vw vh taro css-scale mobile-design viewport-units