SEOFree · no sign-up
Alt text checker
Find every image on a page that has no alt text. The checker lists each image with a thumbnail, its alt text or a warning, and separates decorative images (alt="") from ones that are simply missing it.
Loading the tool…
How to use the Image SEO Checker
- 1Enter the address of the page to check.
- 2Read the summary: images, missing alt text, missing sizes, lazy-loaded and modern formats.
- 3Filter the list to see only the images with a problem, each with a thumbnail.
- 4Fix them in your CMS, then compress heavy images with the free Image Compressor.
Frequently asked questions
Is missing alt text an accessibility problem?
Yes. Screen readers read alt text aloud; without it they may read the file name or skip the image. WCAG requires a text alternative for every meaningful image.
What is the difference between empty and missing alt text?
alt="" deliberately tells screen readers to skip a decorative image. No alt attribute at all is an error, because the reader doesn't know whether the image matters.
Does alt text help images rank in Google Images?
Yes, it's one of the main signals Google uses to understand an image, together with the text around it and the file name.
Related free tools
All toolsThen schedule it with Join Postly
Plan, publish and track your posts on every network from one calendar. Free plan, no credit card.
No credit card required Free forever plan Cancel anytime