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@csstools

CSS Tools

We help you write your best CSS

Hey there 👋!

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We're building CSS Tools to enable you to use the newest features of CSS without having to worry about the browsers you're supporting.

We're doing that with PostCSS which allows us to create plugins that you can use to transform your CSS code so it's compatible with all browsers ✨.

We've created PostCSS Preset Env which packs all of these plugins together and lets you just configure and forget.

You can find the CSS features on cssdb.org which we keep up to date with the state they're, the support they have and some examples and links to get you used to that feature 🤓.

We're available through these channels:

And if you're curious to know what we're working on or how could you contribute, the projects are always a good first stop!

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  1. postcss-plugins postcss-plugins Public

    PostCSS Tools and Plugins

    CSS 1k 86

  2. cssdb cssdb Public

    A database of staged CSS features

    JavaScript 543 31

Repositories

Showing 10 of 120 repositories
  • csstools/postcss-plugins-directory’s past year of commit activity
    JavaScript 7 MIT 0 0 0 Updated Mar 13, 2026
  • postcss-plugins Public

    PostCSS Tools and Plugins

    csstools/postcss-plugins’s past year of commit activity
    CSS 1,041 MIT-0 86 9 (1 issue needs help) 0 Updated Mar 10, 2026
  • cssdb Public

    A database of staged CSS features

    csstools/cssdb’s past year of commit activity
    JavaScript 543 MIT-0 31 0 0 Updated Mar 9, 2026
  • postcss-sass Public

    Use Sass as a PostCSS plugin

    csstools/postcss-sass’s past year of commit activity
    JavaScript 149 CC0-1.0 30 1 1 Updated Mar 4, 2026
  • postcss-normalize Public

    Use the parts of normalize.css (or sanitize.css) you need from your browserslist

    csstools/postcss-normalize’s past year of commit activity
    CSS 839 CC0-1.0 40 3 0 Updated Mar 1, 2026
  • stylelint-value-no-unknown-custom-properties Public

    A stylelint rule to catch usage of unknown custom properties

    csstools/stylelint-value-no-unknown-custom-properties’s past year of commit activity
    JavaScript 75 CC0-1.0 32 1 0 Updated Mar 1, 2026
  • stylelint-media-use-custom-media Public

    Enforce usage of custom media queries in CSS

    csstools/stylelint-media-use-custom-media’s past year of commit activity
    JavaScript 16 CC0-1.0 4 0 0 Updated Mar 1, 2026
  • postcss-input-range Public

    Use unprefixed input range selectors in CSS

    csstools/postcss-input-range’s past year of commit activity
    JavaScript 43 CC0-1.0 5 1 0 Updated Mar 1, 2026
  • postcss-resolve-nested-selector Public

    Resolve a nested selector in a PostCSS AST

    csstools/postcss-resolve-nested-selector’s past year of commit activity
    JavaScript 13 MIT 5 0 0 Updated Mar 1, 2026
  • normalize.css Public

    A cross-browser CSS foundation

    csstools/normalize.css’s past year of commit activity
    HTML 648 CC0-1.0 66 4 2 Updated Mar 1, 2026

Sponsors

  • @storyblok
  • @syntaxfm
  • @GitbookIO
  • @roboflow
  • @devope
  • @argyleink
  • @evilmartians
  • @ai

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