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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 Apr 8, 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 Apr 6, 2026
  • postcss-plugins Public

    PostCSS Tools and Plugins

    csstools/postcss-plugins’s past year of commit activity
    CSS 1,045 MIT-0 86 11 (1 issue needs help) 0 Updated Apr 6, 2026
  • tokenizer Public

    Tokenize CSS according to the CSS Syntax

    csstools/tokenizer’s past year of commit activity
    TypeScript 73 CC0-1.0 6 0 0 Updated Apr 6, 2026
  • convert-colors Public Forked from jonathantneal/convert-colors

    Convert Colors converts colors between RGB, HEX, HSL, HWB, LAB, LCH, and more

    csstools/convert-colors’s past year of commit activity
    JavaScript 0 CC0-1.0 8 0 0 Updated Apr 5, 2026
  • postcss-extend-rule Public

    Use the extend at-rule and functional selectors in CSS

    csstools/postcss-extend-rule’s past year of commit activity
    JavaScript 54 CC0-1.0 7 4 0 Updated Mar 27, 2026
  • sanitize.css Public

    A best-practices CSS foundation

    csstools/sanitize.css’s past year of commit activity
    CSS 5,292 CC0-1.0 307 18 3 Updated Mar 26, 2026
  • normalize.css Public

    A cross-browser CSS foundation

    csstools/normalize.css’s past year of commit activity
    HTML 653 CC0-1.0 66 5 1 Updated Mar 26, 2026
  • stylelint-use-nesting Public

    Enforce nesting when it is possible in CSS

    csstools/stylelint-use-nesting’s past year of commit activity
    JavaScript 48 CC0-1.0 10 1 0 Updated Mar 26, 2026
  • stylelint-use-logical Public

    Enforce usage of logical properties and values in CSS

    csstools/stylelint-use-logical’s past year of commit activity
    JavaScript 72 CC0-1.0 9 6 4 Updated Mar 26, 2026

Sponsors

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

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