When we have audio on our pages, both audio-only as well as videos, those users who can't hear or have trouble hearing will miss out on this content. In order to allow them to benefit from this information we need to have all audio in text form included on the page. This can either be captions within a video or text transcripts.

WCAG 1.2.1: Audio-only and Video-only (Prerecorded) Opens in a new window

WCAG 1.2.2: Captions (Prerecorded) Opens in a new window

WCAG 1.2.4: Captions (Live) Opens in a new window


  • Every audio-only file has a text transcript.
  • Every video with audio has captions, including dialog, who is speaking, and sound effects.
  • If the video is an alternative for text already on the page it is exempt from this standard.


  • Captions can be included in three ways: embedded in the video and always on, included as a seperate track that can be toggled on and off, or via a separate link adjacent to the original video link.

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