Success Criterion 1.1.1
Conformance level A

Image Alt Text That Repeats a Caption Word for Word

1.1.1 — Non-text Content

Scenario

Setting

A ticket marketplace's seat-selection map

What’s wrong

Redundant alt duplicating adjacent caption/link text, creating double announcements (fails the "equivalent purpose" intent and creates noise. F-adjacent).

Example

<img src="chart.png">

Why it matters

Blind and low-vision people using screen readers, and anyone who browses with images disabled, when icons or photos carry meaning.

How to test

Check for double announcements: if an image's alt repeats text already in an adjacent caption or link, a screen reader announces the same content twice — set alt="" instead.

How to fix

Remove the duplicated alt (empty alt) when a caption or link text already conveys the same content.

<img src="chart.png" alt="Q3 revenue chart showing 12% growth">

The alt attribute gives assistive technology the same information the image conveys visually.

Outcome

On a ticket marketplace's seat-selection map, this barrier is gone for blind and low-vision people using screen readers — they can finish what they came here to do.

Who is affected