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PostCSS

PostCSS

PostCSS - Modular CSS transformation tool

PostCSS is a JavaScript-based CSS processor using plugins to transform CSS via an abstract syntax tree for autoprefixing, linting, and future CSS features.

Category

CSS Processor / Tooling

First Release

2013

File Extension

.css

Creator

Andrey Sitnik

Latest News

Malicious Postcss-Animate-Utils Package Found in Antfarm Tech Repository

A malicious secondary dependency, @aaron205whitmore/postcss-animate-utils version 1.0.2, has been identified in Antfarm Tech's "proof_of_dev" repository, allowing for remote code execution.

9/17/2026 • 0 likes

Difficulty

Intermediate 2/3

JavaScript plugin ecosystem and AST manipulation require Node.js knowledge beyond standard CSS authoring.