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EPUB Accessibility Checker

Validate your EPUB files for accessibility: alt text, language declarations, heading structure, ARIA, tables, and WCAG conformance — instantly, for free.

Free accessibility tool

Your file is processed securely and deleted immediately after analysis.

Images & Alt Text

Checks every image for alt text, decorative image markup, SVG accessibility, figure captions, and image-of-text detection.

Document Structure

Validates heading hierarchy, semantic HTML5 elements, epub:type usage, language declarations, and proper list markup.

Navigation & WCAG

Analyzes table of contents, landmarks, page lists, link text quality, ARIA roles, and estimates WCAG 2.1 conformance level.

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What the EPUB Accessibility Checker does

Accessible ebooks reach more readers — and in the EU the European Accessibility Act makes accessibility a legal requirement for most titles sold from June 2025. This free accessibility checker audits your file with Ace by DAISY, the reference accessibility checker for EPUB, against WCAG 2.1 and the EPUB Accessibility 1.1 specification.

It inspects the things screen-reader users depend on: image alt text, language declarations, heading structure and reading order, table markup, ARIA roles, and the accessibility metadata that bookstores now display to readers. You get a clear breakdown of what passes, what fails, and what a human still needs to review by hand.

It is free, private, and runs one book at a time — a fast way to know exactly where a title stands before you publish or start remediation.

When to use it

  • Preparing a catalog for European Accessibility Act compliance.
  • Checking whether a title declares the accessibility metadata retailers surface.
  • Auditing alt text, structure and navigation before publication.
  • Prioritizing which backlist titles need remediation first.
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Accessibility evaluated with Ace by DAISY (© the DAISY Consortium, MIT license) against WCAG 2.1 Level AA and EPUB Accessibility 1.1 maintained by the W3C.