万维网联盟（World Wide Web Consortium，简称W3C）创建于1994年，是Web技术领域最具权威和影响力的国际中立性技术标准机构（W3C视频）。
到目前为止，W3C已发布了200多项影响深远的Web技术标准及实施指南，如广为业界采用的超文本标记语言（HTML）、可扩展标记语言（XML）以及帮助残障人士有效获得Web内容的信息无障碍指南（WCAG）等，有效促进了Web技术的互相兼容，对互联网技术的发展和应用起到了基础性和根本性的支撑作用。
w3c中国的GitHub
EPUB 3 Community Group Repository
Latest draft @
Mirror of https://hg.css-houdini.org/drafts
Shared workspace for EPUB 3 specifications.
The Service Worker Specification https://w3c.github.io/ServiceWorker/
The Micropub spec
Test suites for Web-platform specs — including WHATWG, W3C, and others
Discussion of blockchains for the Blockchain Community Group and workshops
SVG Working Group specifications
Repository for the WebVR Community Group and the WebVR Specification.
Web Components specifications
Guidelines for Security Disclosures
Specification of the extraction/transformation of Microdata content to RDF
Accessible Rich Internet Applications (WAI-ARIA)
WAI-ARIA Authoring Practices, maintained by ARIA WG https://www.w3.org/WAI/ARIA/
WebIDL parser
Working Draft of the HTML specification
Web Application Security Working Group repo
W3C Web Performance Working Group repo
WebAppSec Content Security Policy
Web Media porting spec
Activity Streams 2.0 Editor Drafts
W3C Web Payments Browser API
Mirror of CSS WG Editor Draft repository - https://hg.csswg.org/drafts
MusicXML specification
Encrypted Media Extensions -- https://w3c.github.io/encrypted-media/