SEO Tools

Image Alt Text Checker

Extract all `<img>` tags from a page or HTML snippet and check their alt text. Lists images with missing alt, empty alt (decorative), and those with present alt text, for both accessibility compliance and SEO purposes.

Free SEO analysis No sign-up required Instant results

Audit every image for alt text & performance

Fetch any live URL and instantly audit alt text quality, lazy loading, srcset/WebP usage, keyword integration, and layout shift attributes — across every image on the page.

Never stored Alt text quality Lazy load · srcset · WebP Keyword in alt
Paste HTML Paste full page source or the <body> section

Features

  • Extracts all img elements from URL or HTML paste
  • Categorises: missing alt, empty alt, present alt
  • Shows image src and alt text for each
  • Calculates percentage with missing alt
  • Download image alt report as CSV
  • Fetches public URLs only

How to use it

  1. Enter a public URL or paste HTML.
  2. All images are extracted and categorised.
  3. See missing, empty, and present alt counts.
  4. Export the full report as CSV.

Use cases

  • Auditing page accessibility before a WCAG compliance review
  • Checking SEO image alt text coverage
  • Finding images that need alt text in a CMS content audit
  • Verifying images have appropriate alt text after migration

Limitations

  • Dynamically injected images (via JavaScript) are not captured in URL analysis.
  • CSS background images are not detected.
See also

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Questions & answers

Frequently asked

Is empty alt the same as missing alt?

No. alt='' (empty string) is the correct way to mark decorative images (screen readers skip them. Missing alt is an accessibility error) screen readers read the src filename instead.