Learn what alt text is, why it’s important and how to write it.
Alternative text—or alt text—is a textual substitute for non-text content in web pages. It is a short, written description of an image that describes the appearance, content and/or function of an image on a page.
Alternative text serves several purposes:
Poor alt text: pie
Good alt text: Overhead view of a blueberry pie with the UB Bulls spirit mark cut out of the top crust.
Poor alt text: researcher
Good alt text: Sideview of a student looking into a microscope with bright streaks of light on the left side of the photo.