Image Alt Text Checker
Paste HTML to check every <img> tag's alt attribute for missing, empty, or placeholder-looking values.
0 images found
No <img> tags found in that HTML.
Alt text exists first for accessibility, screen reader users rely on it to know what an image shows. That it also helps SEO is a side effect, not the main point, so write it to describe the image, not to stuff in keywords.
Frequently asked questions
Is empty alt text (alt="") always a problem?+
No, it's actually correct for purely decorative images (a background flourish, a spacer), where announcing them to a screen reader would just be noise. It's only a problem when the image conveys real information and got an empty alt anyway.
What counts as a "suspicious" alt text in this checker?+
Filenames or generic placeholders used as the alt text itself, like alt="IMG_4821.jpg" or alt="banner.png". That tells a screen reader nothing about what the image actually shows.
Is alt text mainly an SEO thing or an accessibility thing?+
Accessibility first, it's how screen reader users know what an image shows. That it also happens to help SEO is a side effect, which is exactly why keyword-stuffed alt text tends to backfire: it fails the accessibility purpose it exists for.