accessibility · free Companion App · local in this browser
Slide Alt-Text Coverage Check
Turn image counts into the missing alt-text count and a coverage percent for the deck.
Privacy: This App does not send or save your entries. Do not enter passwords, codes, full account numbers, or private identifiers.
Enter your numbers
Enter only the details needed for this task. Check them against the original source.
Your result
Your result will appear here.
Engine self-test
Running golden cases…
Source notes
- World Wide Web Consortium, Web Accessibility Initiative — Writing Alt Text for Images
WAI's decision tree asks authors to decide whether an image is decorative, functional, or informative before writing alt text.
Reviewed 2026-10-10. Context changes the right alt text. Test with a screen reader for your own page.
What this App does not do
This App counts coverage from the numbers you enter. It does not write alt text or judge image meaning.
This free App has no paid features. It does not contact an agency, employer, bank, seller, provider, or other person.