Repositories list

• webref

  Public
  Machine-readable references of terms defined in web browser specifications

  cssidlweb-platform+ 1

  cssidlweb-platformdefinitions-data

  JavaScript

  •

  MIT License

  •118•414•50•4•Updated Mar 14, 2026Mar 14, 2026

• validate-repos

  Public
  Test whether W3C spec repos match a set of best practices

  JavaScript

  •

  Other

  •14•21•16•9•Updated Mar 14, 2026Mar 14, 2026

• AB-public

  Public

  w3c/AB-public’s past year of commit activity
  Advisory Board repository for materials not meant to be restricted to W3C Members

  HTML

  •23•27•27•1•Updated Mar 14, 2026Mar 14, 2026

• specberus

  Public
  Checker used at W3C to validate the compliance of Technical Reports with publication rules

  HTML

  •

  MIT License

  •56•89•48•5•Updated Mar 13, 2026Mar 13, 2026

• browser-specs

  Public
  A machine-readable list of Web specifications

  JavaScript

  •

  Other

  •52•302•75•6•Updated Mar 13, 2026Mar 13, 2026

• spec-generator

  Public
  Service to automatically generate specs from various source formats

  TypeScript

  •

  MIT License

  •17•39•7•7•Updated Mar 13, 2026Mar 13, 2026

• css-validator

  Public

  w3c/css-validator’s past year of commit activity
  W3C CSS Validation Service

  Java

  •

  Other

  •115•234•58•7•Updated Mar 13, 2026Mar 13, 2026

• largest-contentful-paint

  Public

  w3c/largest-contentful-paint’s past year of commit activity
  Specification for the LargestContentfulPaint API

  Bikeshed

  •

  Other

  •21•99•48•3•Updated Mar 13, 2026Mar 13, 2026

• json-ld-bp

  Public

  w3c/json-ld-bp’s past year of commit activity
  JSON-LD 1.1 Best Practices Note

  json-ld-wgjson-ld-11

  json-ld-wgjson-ld-11

  HTML

  •

  Other

  •3•27•20•0•Updated Mar 13, 2026Mar 13, 2026

• publ-a11y

  Public

  w3c/publ-a11y’s past year of commit activity
  Accessibility related discussions of the Publishing@W3C Groups

  accessibilitypublishingdigital-publishing+ 1

  accessibilitypublishingdigital-publishingpm-wg

  HTML

  •

  Other

  •6•36•56•0•Updated Mar 13, 2026Mar 13, 2026

• activitystreams

  Public

  w3c/activitystreams’s past year of commit activity
  Activity Streams 2.0

  socialsocial-networkformat+ 5

  socialsocial-networkformatfeedspecificationactivitiesas2activitystreams

  HTML

  •

  Other

  •65•307•72•25•Updated Mar 13, 2026Mar 13, 2026

• wcag

  Public
  Web Content Accessibility Guidelines

  HTML

  •

  Other

  •372•1.4k•488•96•Updated Mar 13, 2026Mar 13, 2026

• csswg-wiki

  Public

  w3c/csswg-wiki’s past year of commit activity
  CSS Working Group Wiki – community-editable documentation

  csswikiw3c+ 1

  csswikiw3cw3css

  Markdown

  •8•4•0•1•Updated Mar 13, 2026Mar 13, 2026

• imsc-tests

  Public
  IMSC test suites

  Other

  •4•16•9•6•Updated Mar 13, 2026Mar 13, 2026

• lws-protocol

  Public
  Linked Web Storage Protocol

  HTML

  •

  Other

  •7•22•27•6•Updated Mar 13, 2026Mar 13, 2026

• aria

  Public
  Accessible Rich Internet Applications (WAI-ARIA)

  HTML

  •

  Other

  •144•741•444•59•Updated Mar 13, 2026Mar 13, 2026

• wcag-act-rules

  Public
  WCAG Conformance Test Rules

  HTML

  •

  Other

  •16•29•35•5•Updated Mar 13, 2026Mar 13, 2026

• wai-website

  Public
  This repository hosts the W3C WAI web site.

  accessibilityw3c

  accessibilityw3c

  HTML

  •

  Other

  •1.2k•117•349•55•Updated Mar 13, 2026Mar 13, 2026

• web-performance

  Public
  W3C Web Performance Working Group repo

  HTML

  •

  Other

  •73•431•10•1•Updated Mar 13, 2026Mar 13, 2026

• threat-model-web

  Public
  A Threat Model for the Web

  Bikeshed

  •

  Other

  •2•3•0•0•Updated Mar 13, 2026Mar 13, 2026

• wai-evaluation-tools-list

  Public
  List of Accessibility Evaluation Tools

  accessibility

  accessibility

  JavaScript

  •13•11•19•58•Updated Mar 13, 2026Mar 13, 2026

• epub-specs

  Public
  Shared workspace for EPUB 3 specifications.

  publishingepubdigital-publishing+ 1

  publishingepubdigital-publishingepub-wg

  HTML

  •

  Other

  •65•363•58•5•Updated Mar 13, 2026Mar 13, 2026

• wcag2ict

  Public

  w3c/wcag2ict’s past year of commit activity
  WCAG2ICT deliverable of Accessibility Guidelines WG

  JavaScript

  •

  Other

  •8•40•59•5•Updated Mar 13, 2026Mar 13, 2026

• onboarding

  Public
  A tool to send the facility map to newcomers in a group

  JavaScript

  •

  MIT License

  •18•8•1•4•Updated Mar 13, 2026Mar 13, 2026

• webvtt

  Public
  WebVTT Standard

  HTML

  •

  Other

  •33•117•102•12•Updated Mar 13, 2026Mar 13, 2026

• csswg-drafts

  Public
  CSS Working Group Editor Drafts

  css

  css

  Bikeshed

  •

  Other

  •779•4.8k•4.3k•140•Updated Mar 13, 2026Mar 13, 2026

• cg-program

  Public
  Repository to track issues and improvements with the W3C Community Groups and Business Groups program

  HTML

  •4•7•13•3•Updated Mar 13, 2026Mar 13, 2026

• wot-cg

  Public

  w3c/wot-cg’s past year of commit activity
  Web of Things Community Group

  webweb-of-thingsinternetofthings+ 1

  webweb-of-thingsinternetofthingswot

  JavaScript

  •

  Other

  •15•23•13•3•Updated Mar 13, 2026Mar 13, 2026

• github-notify-ml-config

  Public

  w3c/github-notify-ml-config’s past year of commit activity
  Configuration for mailing lists using github-notify-ml

  35•14•5•0•Updated Mar 13, 2026Mar 13, 2026

• mnx

  Public

  w3c/mnx’s past year of commit activity
  Music Notation CG next-generation music markup proposal.

  HTML

  •21•210•125•2•Updated Mar 13, 2026Mar 13, 2026