Revamped testbed

CAPTCHA purpose text alternative (captcha)

CAPTCHAs include a descriptive alt attribute or accompanying explanation for its purpose.

Non-descriptive alt text:

This CAPTCHA element has a non-descriptive text alternative:

Keyboard

Enter the code you see or hear:

Note: Hard to implement, because you need AI / human to check if the CAPTCHA image alt attribute is descriptive.

Above CAPTCHA has alt="Keyboard"