Alt Text Checker

What is an alt text checker?

An alt text checker reviews the images on a live page and tells you whether each image has an alt attribute, an empty decorative alt, or text that looks too generic to be useful. It is part accessibility audit, part image SEO review, and part content QA.

That matters because missing alt text creates two different problems. Screen reader users lose context, and search engines get weaker image signals. Teams often catch this late because image fields live inside CMS blocks, design systems, or marketing templates instead of the main copy workflow.

This free alt text checker fetches the page, inspects everyimg tag it can find, and highlights the rows that deserve a manual review before you publish, migrate, or hand off the page.

How to use this alt text checker

Start with the summary counts, then open the flagged rows. Missing alt attributes come first because they remove the image description completely. After that, review warnings such as duplicate descriptions, filename-like alt text, or very short labels that do not explain what the image contributes.

<img src="/team-photo.jpg" alt="Customer success team standing in the Austin office" />
<img src="/divider.svg" alt="" />
<img src="/hero-final-v4.png" alt="hero-final-v4" />

In that example, the first image is descriptive, the second is intentionally decorative, and the third is the kind of filename-based alt text the tool will flag. That does not always mean the page is broken, but it is usually a good sign that the content never got a final accessibility pass.