The W3C is the international non-profit that publishes the web's standards, including CSS and, through its Web Accessibility Initiative, WCAG. Tim Berners-Lee founded it in 1994 and more than 330 member organizations work on the standards. It became a legal entity in its own right in January 2023, after 28 years hosted by four institutions, three universities and a European research consortium. The word to watch on anything it publishes is Recommendation. That is the name for a finished W3C standard, and WCAG is one. A W3C Note is a different kind of document on a different track, and it is not a standard. That distinction decides whether the page somebody just sent you is quoting the standard or explaining it. We are independent of the W3C. We explain and audit against their standard.
In practice
W3C publishes on three separate tracks and only one of them produces standards. A Recommendation goes through public working drafts and a candidate stage before it is finished, and it carries patent commitments from the members who worked on it. There used to be a proposed stage after that, and the 2025 revision of W3C's own process retired it, so a document you meet at Candidate Recommendation is one approval away rather than two. A Note carries none of that, and neither does a registry. So when somebody tells you what W3C requires, the first question is which kind of document the sentence came from, and the answer is printed at the top of every page they publish.
The accessibility work runs through the Web Accessibility Initiative, and all of it is free to read. Reaching for the Understanding document for a criterion is usually faster than arguing about it, which makes it a better authority than a vendor's summary, and it costs nothing to check.
The standard is written by the industry it governs, in public. The editors named on WCAG 2.2 were listed at a consultancy, a database company, a design software company and a national library, and the working group's participants are listed in the document itself. That is worth knowing when somebody asks whether the standard was written by academics who have never shipped anything.
Why it matters
W3C is the primary source, and everything downstream of it is somebody's reading. When a law or a contract names WCAG, it is naming a W3C Recommendation. The text that settles the argument is public, free and one click away, rather than locked behind a standards body's paywall. That is unusual, and it is the reason nobody in this field has an excuse for guessing.
The test to run on any W3C link
Look at the status line at the top. If it says W3C Recommendation, the document is a finished standard and the requirements in it are the ones a law or a contract can point at. Read on, because a Recommendation carries informative sections too, and the appendices and notes inside WCAG are not requirements. If it says Group Note, the whole document explains, illustrates or advises, and quoting it as a requirement is a category error.
Where this shows up on the site
Related terms
- WAIWAI is the branch of the W3C that develops accessibility standards and guidance.
- WCAGWCAG is the international standard for web accessibility, published by the W3C.
- TechniqueA technique is one of the W3C's documented ways of meeting, or of failing, a WCAG rule.
- Success criterionA success criterion is a single testable rule in WCAG, and it is the unit everything else is built from.
Knowing the word is the easy part.
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