The alt attribute describes what an image shows. Screen readers announce it, browsers display it if the image fails and search engines use it to understand the image.
Decorative images should have an empty alt attribute so they are skipped.
Missing alt text is an accessibility failure and a missed chance to describe product and diagram images to search engines.
VisibilityKit Crawler lists images it finds during a crawl and flags those missing alt text.
Long enough to describe the image in context, usually a short sentence.
Informative images do. Purely decorative images should use an empty alt attribute.
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Machine-readable markup (like Schema.org) that helps AI platforms understand and accurately represent your content.
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