Keep this in mind as you decide where to place the image description. This might be helpful for all users, not just users who are unable to see the image. This might include text that describes the highlights of the image, or it might include structured data organized using headings, lists, and tables that users can explore. Instead, detailed descriptions of these images should be provided elsewhere (e.g., on the same page or on a separate page). Complex imagesĬomplex images such as graphs, charts, or diagrams, may contain too much information to be effectively described using alt text. Most authoring tools provide a means of adding or editing an image’s alt text, usually in a dialog that appears when an image is added, or later within an image properties dialog. Browsers also display alt text visibly if an image fails to load. Simple images must be described with alternative text, or “alt text.” Alt text is a short description of the content of the image, added in such a way that is typically invisible to people who can see the image but is exposed to people who are using assistive technologies, such as screen readers or Braille displays. Decorative image: The image is purely decorative, not informative. Complex image: The image conveys complex information (e.g., a chart or graph).Simple image: The image conveys simple information (e.g., a photograph, icon, or logo).Techniques for describing images vary, depending on the type and purpose of the image: When screen readers encounter an image with alt text, they typically announce “Image” and then read the alt text. Alt text should be succinct, just enough text to communicate the idea without burdening the user with unnecessary detail. Users who are unable to see images depend on alternative text, often abbreviated as “alt text.” Alt text is a short description of the image, residing behind the scenes, where its purpose is to communicate the content of an image to people who can’t see it (for example, a person who is blind, using an audible screen reader or Braille device).
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