Free tool

Alt Text Checker

Paste a page’s HTML to audit every image’s alt attribute at once. Spot missing alt, empty alt on meaningful images, and low-quality descriptions (WCAG 1.1.1).

How alt is graded

  • Missing — no alt attribute at all. Fails WCAG 1.1.1.
  • Empty (alt="") — fine for decorative images, a problem for meaningful ones.
  • Suspicious — looks like a filename, starts with “image of”, or is very long.
  • Present — has descriptive text.

Not sure what good alt text looks like? Read How to Write Alt Text (with examples).

Frequently asked questions

What does this alt text checker flag?
It lists every in the HTML you paste and classifies its alt attribute: missing (fails WCAG 1.1.1), empty (decorative — fine only if the image carries no meaning), suspicious (filename, “image of…”, or over 125 characters), or present and descriptive.
Is an empty alt attribute always wrong?
No. alt="" is correct for purely decorative images so screen readers skip them. It’s only a problem when a meaningful image has empty alt. Omitting the attribute entirely is always wrong.

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