Descriptions should be meaningful and contain at least 7 and less than 90 characters.


Best Practice Type: Pass/Warning

If the content of the alt attribute is not empty, it should contain at least 7 characters and less than 90 characters. The text should provide people who cannot see the image with an orientation to the content and the purpose of the image in the web resource.


  • No evaluation should be made when the alt attribute content is empty.



Associated Accessibility Guidelines and Standards

Guideline or
Requirement Priority Test
IITAA 4.1 Provide appropriate "alternate text" for all images. Required Violation
Section 508 1194.22 (a) A text equivalent for every non-text element shall be provided (e.g., via "alt", "longdesc", or in element content). Required Violation
WCAG 1.0 1.1 Provide a text equivalent for every non-text element (e.g., via "alt", "longdesc", or in element content). This includes: images, graphical representations of text (including symbols), image map regions, animations (e.g., animated GIFs), applets and programmatic objects, ascii art, frames, scripts, images used as list bullets, spacers, graphical buttons, sounds (played with or without user interaction), stand-alone audio files, audio tracks of video, and video. Required Violation
WCAG 2.0 1.1.1 Non-text Content Required Violation


Evaluation Techniues

Testsuite Tests