methodology / Accessibility / #54

Image alt text coverage

live factor #54 · Accessibility · scoring impl: implemented · weight 1.3%

What we measure

Every meaningful image needs alt text so screen readers can describe it. Decorative-only images use `alt=""` (empty). We measure what fraction of your images have any alt attribute at all.

How to improve your score

Add `alt="..."` to every `<img>` tag. In WordPress, set it in the media library when uploading. For decorative images, use `alt=""` explicitly.

Data source

Data source for this factor is not yet documented.

Implementation notes

Count `<img>` tags with vs without an `alt` attribute and report the coverage ratio.

Scoring

Scoring formulas are versioned with the methodology. The current method (v1.1.0) maps raw measurements to pass, warn, fail. Factor weights determine how much each contributes to the composite — see the methodology index for the full table.

Version history

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