Image Element Missing alt Attribute

Compliance Data & User Impact

User Impact: Critical

100% Complete

Disabilities Affected:

  • blindness
  • deafblindness
  • learning disablities

WCAG Version:
2

WCAG Levels:

  • A

WCAG Guidelines:

Solution Techniques:

Automated Test Accuracy:
High

uTester Severity:
3

DRRSAG Designations:

  • description

How to Fix the Problem

When using the img element, specify a short text alternative with the alt attribute or use an empty alt in case of a decorative image. When an image contains words that are important to understanding the content, the alt text should include those words. This will allow the alt text to play the same function on the page as the image. Note that it does not necessarily describe the visual characteristics of the image itself but must convey the same meaning as the image.

The Algorithm, in Simple Terms

The engine scans the page for <img> elements which are not the child of a link and are missing an alt attribute.

Why Is it Important?

The intent of this is to make information conveyed by non-text content accessible through the use of a text alternative. Text alternatives are a primary way for making information accessible, because they can be rendered through any sensory modality (for example, visual, auditory or tactile) to match the needs of the user. Providing text alternatives allows the information to be rendered in a variety of ways by a variety of user agents. For example, a person who cannot see a picture can have the text alternative read aloud using synthesized speech.

Code Example

<img src="example.png" alt="This is an example image"/>

Additional Information

Relevant Technologies: Applies to content using image-based submit buttons.

This element perfoms as a container, and has no functionality. This container may contain another elements that has functionality or logical role.

Ignore this issue if this element has an alternative that performs the same and overrides the content of this element.

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