Find the images that need a closer look
Alt Tag Checker
Audit image alt attributes in pasted HTML. Separate missing attributes from intentionally empty alternatives, review each image source, and export your findings.
Image alt audit
Your image counts and alt text review will appear here.
Alt Tag Checker: what your check tells you
An alt tag checker helps you find image elements whose alternatives need attention. In HTML, alt is an attribute on an image, not a separate tag. A missing attribute, an empty value and a useful description are three different cases.
This local audit inspects img elements in the HTML you paste. It does not fetch the page, judge the image visually, execute JavaScript, load images or certify accessibility. It counts image occurrences rather than deduplicating files, because the same image can serve different purposes in different contexts.
Missing attribute
An img element without alt needs review. Assistive technology may announce its filename instead of a useful alternative. Decide whether the image conveys information or is decorative.
Empty alternative
An explicit alt="" can be right for a decorative image. Keep it empty when the image adds no information; add useful text when it communicates something the reader needs.
Whitespace only
Spaces inside alt are listed separately. Review the image purpose, then use a genuinely empty value for decoration or meaningful text for information.
Text present
A non-empty value is not automatically a good alternative. Check that it describes the purpose in context without stuffing keywords, repeating nearby text or relying on the filename.
HOW IT WORKS
From a check to a useful next step
Paste source or rendered HTML
Copy the HTML from your page source or browser developer tools. Pasting a web address alone does not retrieve that page.
Review each category
Start with missing attributes, then review empty alternatives in context. Filter the results and compare image source and alt text.
Fix and recheck
Update your templates or CMS fields, export the review list, then audit fresh HTML after publishing. Test the page with assistive technology as part of a broader review.
The same attribute, three different decisions
Informative product image
<img src="mug.jpg" alt="Blue ceramic mug with a curved handle">Describe the information the image contributes. This example gives a shopper a concrete visual detail.
Decorative divider
<img src="divider.svg" alt="">An empty alternative can keep a decorative image from adding noise to the reading experience.
Size chart with no alternative
<img src="size-guide.png">Missing alt needs review. A complex chart may also need nearby text or a data table, beyond a short alternative.
For contextual guidance, read the W3C image alt decision tree.