Some images need alternative (alt) text, but not all! You only need to add alt text to images that are necessary to understand the content. Other images can be flagged as decorative, or marked by using empty quotation marks (“”) as alt text.
For images that are required to understand the content, alt text needs to be useful first and foremost. Make sure that your alt text:
- Is short and to the point.
- Avoids “picture of” or “image of.” People viewing alt text will already know it’s an picture.
- Uses empty quotes – “” – to signify that images are purely decorative. Think about why you’re including the image, and more images than you expect will fall under this category of pure decoration.
- Is not AI generated. Automatically generated alt text is often too verbose and misses the point of why you included the image. A short sentence you write is much more useful than a paragraph written by a chatbot.
For instructions on how to add alt text, please use the navigation bar on the right and select the program you’re working with.
Information about how to use alt text on popular social media sites can be found here:
There are also two types of images you should pay special attention to: images of text, and charts.
Images of text should be avoided whenever possible. In the instances they cannot be avoided, like logos, Alt text for images of text should simply be that text in quotation marks.
Charts can be difficult to develop alt text for as they are very information dense; because of this, tables should be used as a supplement or substitution whenever possible. If you are supplementing your chart with a table that has the same data, the chart can be marked as a decorative image. If you cannot provide a table, charts are one of the rare instances where you can disregard the “don’t use AI for alt text” rule; asking a chatbot to describe your chart can be a good place to start. However, as with anything AI generated, be sure to keenly scrutinize the output for inaccuracies.