Last Updated on March 4, 2026
PostCSS is a tool for transforming styles with JS plugins. These plugins can lint your CSS, support variables and mixins, transpile future CSS syntax, inline images, and more.
PostCSS takes a CSS file and provides an API to analyze and modify its rules (by transforming them into an Abstract Syntax Tree). This API can then be used by plugins to do a lot of useful things, e.g., to find errors automatically, or to insert vendor prefixes.
Currently, PostCSS has more than 200 plugins.
This is free and open source software.
Website: github.com/postcss/postcss
Support:
Developer: Andrey Sitnik
License: MIT License
PostCSS is written in TypeScript and JavaScript. Learn TypeScript with our recommended free books and free tutorials. Learn JavaScript with our recommended free books and free tutorials.
Related Software
| CSS Parsers | |
|---|---|
| PostCSS | Transform styles with JavaScript plugins |
| Lightning CSS | Parser, transformer, bundler, and minifier |
| Rework | Plugin framework for CSS preprocessing |
| Mensch | Non-validating CSS parser |
| CSSTree | Tool set for CSS |
| Stylis | Lightweight CSS preprocessor |
| tinycss2 | CSS parser and generator |
| LibCSS | CSS parser and selection engine |
| Ruby CSS Parser | Load, parse and cascade CSS rule sets |
| ParserLib | CSS3 SAX-inspired parser |
| css-parser | Fork of the cssutils project |
| Stylecow | Modern CSS to all browsers |
| Gonzales PE | CSS parser which plays nicely with preprocessors |
| CSSOM | CSS parser written in pure JavaScript |
Read our verdict in the software roundup.
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