Your alt text passes automated checks. That doesn’t mean it’s any good.

More than one in four images on the web’s most popular home pages have alt text that’s missing, vague, or copied from adjacent images. That’s from WebAIM’s 2026 WebAIM Million report, which found that alt text,an HTML attribute containing text describing the content of an image, was missing on 16.2% of images across the top million home pages. Among the images that did have alt text, another 10.8% provided an undescriptive attribute, such as alt="image" , a raw filename, or a description duplic