How to test Appropriate alternative text

Which standards this maps to

Korean standard (KWCAG 2.2)

5.1.1 Appropriate alternative text

Perceivable

International standard (WCAG 2.2)

1.1.1 Non-text Content (A) ↗

How to test it

Automated checks verify alt text exists; a human must judge whether it conveys the image's meaning. Verify with a screen reader and check decorative images use empty alt.

What automation covers

9 automated rules judge this checkpoint. Each comes with remediation guidance.

• Images must have alternative text image-alt

  Every <img> needs an alt attribute conveying its meaning; use empty alt for decorative images.

• Image buttons must have alternate text input-image-alt

  Provide alt text describing the button's function for <input type="image">.

• Image map areas must have alternate text area-alt

  Each <area> acts as a link and needs alt text describing the destination.

• Object elements must have alternate text object-alt

  Provide fallback content inside <object> or an aria-label.

• SVG images must have an accessible name svg-img-alt

  Give SVGs with role img an accessible name via <title> or aria-label.

• Elements with role img must have alternate text role-img-alt

  Elements with role img need aria-label or aria-labelledby.

• Alt text duplicates nearby text image-redundant-alt

  If adjacent text repeats the alt, use empty alt to avoid double announcement.

• Server-side image maps are not accessible server-side-image-map

  Replace server-side image maps with client-side maps or plain links.

• Alt text is a filename or meaningless value a11ychk:alt-quality

  Alt text must convey the image's meaning. Filenames (F30) or generic words like "image" give screen-reader users no information. Use empty alt for decorative images.