Success Criterion 1.1.1
Conformance level A

CAPTCHA Challenge With No Text-Based Way to Solve It

1.1.1 — Non-text Content

Scenario

Setting

A podcast app's episode list

What’s wrong

CAPTCHA with no text alternative describing its purpose, or only a single sensory modality offered (visual-only, audio-only).

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

Read the CAPTCHA's instructions: it should state its purpose in text and offer at least one non-purely-visual, non-purely-audio method — a single-modality CAPTCHA with no described alternative fails.

How to fix

Describe the CAPTCHA's purpose in text and offer at least one alternative modality (audio + visual, or a non-sensory method).

<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 podcast app's episode list, this barrier is gone for blind and low-vision people using screen readers — they can complete the task without hitting this wall.

Who is affected