PostCSS

Health v2 · maintenance only

Adoption not part of the score

28975 stars · 1644 forks observed · 2026-09-25

What it is AI-extracted, prompt v1, taxonomy v1, 2026-10-05, confidence 0.99

PostCSS is a JavaScript library for parsing CSS into an abstract syntax tree and applying transformations via plugins. It enables linting, autoprefixing, future CSS syntax conversion, and many other custom CSS manipulations.

Use cases

• Add vendor prefixes to CSS automatically using Autoprefixer.
• Lint and enforce style conventions with Stylelint.
• Convert modern CSS features to a form supported by target browsers.
• Apply CSS Modules or component-scoped styles during build.
• Inline images or assets directly into CSS files.
• Create custom CSS transformations with your own plugins.

When to choose

• You need a flexible, plugin‑based system to process CSS at build time.
• Your project requires custom CSS transformations beyond what standard preprocessors offer.
• You want to integrate with existing tooling like webpack, Rollup, or Gulp.
• You need a large ecosystem of ready‑made plugins for autoprefixing, linting, and more.

When to avoid

• You need runtime CSS manipulation directly in the browser without a build step.
• You prefer a full CSS‑in‑JS solution that handles styling at runtime.
• Your project has very simple CSS needs and adding a plugin system would be overkill.

Facets

library · maturity active

parser plugin-system templating web-development frontend browser cli css postcss stylesheet-transformation autoprefixer stylelint css-modules plugin-ecosystem css-processing nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="postcss/postcss")