Note: We’re improving the handbook and it is still a draft. If you find an error, please comment below.

WCAG 2 Specs WCAG 2 Specs

Provide users with alternatives for time-based media on your website, such as captions for video and transcripts for audio.

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Different Contexts for Subtitles and Captions Different Contexts for Subtitles and Captions

Subtitles and closed captions (CC) open up your content to a larger audience, including deaf or hard of hearing viewers or those who speak languages besides the one spoken in your video. They also act as metadata that helps your videos show up in more places on YouTube
—YouTube, Add subtitles & closed captions

Subtitling is most frequently used for translating a video so speakers of other languages can enjoy it. Captioning is more commonly used to aid deaf and hearing-impaired audiences (source: Accredited Language, Subtitles and Captions: What’s the Difference?).

A subtitle might be: Play it once Sam! For old time's sake...
While a caption might read: Piano playing: “As time goes by”.

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Transcription Transcription

Provides a transcription of audio programs for your visitors with hearing problems. The page with the audio can display the transcript text or link to another page with the transcription.

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CAPTCHA CAPTCHA

Provide an alternative option to any CAPTCHA in your forms. CAPTCHAs can be hard to understand and use, becoming a barrier that prevents some people from filling out your forms.

Tip: Avoid using a CAPTCHA. Read, for example, CAPTCHAs: How bad are they really for User Experience?

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Resources Resources