Accessibility
EPUB Accessibility Checker
Check whether your EPUB meets basic accessibility requirements. The checker looks for missing image alt text, heading hierarchy issues, missing language metadata, navigation structure, and reading order. Use the report to improve accessibility for screen reader users before publishing.
Input formats
Output formats
Common uses
- Check whether images have alt text for screen readers
- Verify heading structure is logical and navigable
- Check that the book language is set correctly
- Identify accessibility gaps before submitting to library or institutional distributors
Limitations
- This tool checks common accessibility basics, not full WCAG 2.1 or EPUB Accessibility 1.1 compliance.
- Color contrast cannot be checked from EPUB source files.
- For full compliance, use an accessibility audit tool such as Ace by DAISY.
Your e-book files, handled privately
This tool runs entirely in your browser. Your files are never uploaded to a server. This tool does not remove DRM or bypass copyright protection. Only upload files you own or have permission to process.
Frequently asked questions
EPUB Accessibility 1.1 is a W3C specification that defines how EPUB publications should meet WCAG 2 accessibility guidelines. It is increasingly required by publishers and distributors.
Ace by DAISY is the official open-source EPUB accessibility checker from the DAISY Consortium. It provides more comprehensive accessibility checking than this browser-based tool.