accessibility · free Companion App · local in this browser
Alt Text Length Checker
Measure an alt draft's character count against a working band and flag missing descriptive shape.
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 2026-10-09. Context changes the right alt text. Test with a screen reader for your own page.
What this App does not do
This App measures the text you enter. It does not judge meaning for your context, generate alt text, or run a screen reader.
This free App has no paid features. It does not contact an agency, employer, bank, seller, provider, or other person.