Do my images have alt text?

Updated 2026-10-17

Short answer: alt text describes an image for people using screen readers and for search engines. Images without it are a common accessibility failure and a missed chance to be found in image search.

How to check it yourself

  1. View a page's source and search for <img.
  2. Check each has an alt="..." that describes the image.
  3. Decorative images can use an empty alt="" on purpose.
  4. Add alt text in your CMS's image settings.

Why it matters

Alt text describes an image for people using screen readers, and it's shown when the image fails to load. Search engines also use it to understand images. Missing alt text makes the site harder to use for some visitors, and in some places accessibility is a legal requirement for businesses.

Common causes

  • Images were uploaded without filling in the alt field.
  • A page builder or theme outputs images with an empty alt attribute.
  • Images were added in bulk from a media library or import.
  • Decorative images aren't marked as decorative, so they look like missing alt text.

What Preventionlabs shows

Every report checks up to 50 pages from your sitemap for images without alt text, alongside missing and duplicate titles and descriptions.

Price

First report free, no card needed. Then A$50 a month, up to 10 domains.

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