WCAG 3.0 is an active W3C Working Draft in development by the AGWG. Requirements, assertions, the conformance model and reporting tiers are still being developed and may change. The latest published draft is the 10 September 2026 Working Draft; this site follows the editorsโ draft, which also includes exploratory provisions.
developingCore requirement
Captions Synchronized
Group: images-and-media • Guideline: captions
Summary in Plain English
Captions are timed to the audio they represent.
Why It Matters
Captions that run ahead of or behind the speech break the link between the words and who is saying them, and make dialogue hard to follow.