Ebook Accessibility in Libraries: Standards, Compliance & Best Practices

One in six people worldwide lives with some form of disability. In higher education alone, approximately 19% of undergraduates report having a disability, and that figure rises when you include undiagnosed conditions like dyslexia and low vision. For libraries, this is not a niche consideration — it is a fundamental service obligation.

Yet most institutional digital libraries were not built with accessibility as a core requirement. They were built for the majority use case, and accessibility was treated as an afterthought — if it was considered at all. The result is a growing gap between the promise of digital lending ("access for everyone, everywhere") and the reality experienced by readers who use screen readers, require adjustable text, or navigate with keyboards instead of mice.

That gap is now closing — driven by regulation, by institutional policy, and by a growing recognition that accessible design benefits all readers, not just those with diagnosed disabilities. This guide covers the standards you need to know, the compliance requirements you need to meet, and the practical steps to make your digital library genuinely accessible.

The Regulatory Landscape: What You Need to Comply With

Accessibility in digital libraries is not optional in most jurisdictions. Multiple overlapping regulations now apply, and enforcement is intensifying. Here are the frameworks that matter most:

WCAG 2.1 and 2.2 (Web Content Accessibility Guidelines)

Published by the W3C, WCAG is the global reference standard for web accessibility. It defines three conformance levels:

Level A — minimum accessibility (basic requirements like text alternatives for images)
Level AA — the standard most regulations reference (includes contrast ratios, keyboard navigation, consistent interfaces)
Level AAA — enhanced accessibility (sign language for multimedia, simplified reading levels)

Most legal frameworks require Level AA conformance. For library platforms, this means your discovery interface, borrowing workflow, and reading applications must all meet AA criteria — not just the content itself.

EPUB Accessibility 1.1

Developed by the W3C in collaboration with the DAISY Consortium, EPUB Accessibility 1.1 defines how ebook files themselves should be structured for accessibility. Key requirements include:

Proper semantic markup (headings, lists, tables marked up correctly)
Alternative text for all images
Logical reading order that makes sense when the visual layout is removed
Navigation via table of contents, page lists, and landmarks
Accessibility metadata in the package document (declaring what accessibility features the file supports)

This standard matters because even if your platform is fully accessible, inaccessible ebook files will still exclude readers. Content accessibility and platform accessibility must work together.

European Accessibility Act (EAA)

The EAA, which EU member states are implementing into national law with a June 2025 deadline, explicitly covers ebooks and ebook reading software. It requires:

Ebooks to be perceivable, operable, understandable, and robust (aligning with WCAG principles)
Reading systems to support assistive technologies
DRM mechanisms not to block accessibility features
Accessibility information to be provided in ebook metadata

For libraries operating in or serving EU populations, EAA compliance is now a legal requirement, not a best practice. The regulation applies to both the content and the delivery platform.

Section 508 (United States)

Section 508 of the Rehabilitation Act requires federal agencies and federally funded institutions to make their electronic and information technology accessible. For university libraries receiving federal funding (which includes nearly all U.S. higher education institutions), this means:

Digital library platforms must conform to WCAG 2.0 Level AA (with 2.1 increasingly expected)
Procurement decisions must include accessibility evaluation
Voluntary Product Accessibility Templates (VPATs) should be requested from vendors

National Laws

Beyond these frameworks, many countries have their own accessibility legislation that applies to library services:

Canada: The Accessible Canada Act (2019) sets accessibility requirements for federally regulated organizations
United Kingdom: The Equality Act 2010 and Public Sector Bodies Accessibility Regulations 2018
Australia: The Disability Discrimination Act 1992
Latin America: Most countries have ratified the UN Convention on the Rights of Persons with Disabilities, with varying levels of implementation in digital services

Understanding Your Users: Disability Categories and Reading Needs

Effective accessibility planning starts with understanding the diverse ways people interact with digital content. The following categories are not exhaustive, but they cover the most common accessibility needs in digital libraries:

Visual Disabilities

Blindness: Users rely entirely on screen readers (JAWS, NVDA, VoiceOver, TalkBack) to navigate and read content. The reading application must expose all content and controls to the accessibility API. EPUB files must have proper semantic structure and reading order.
Low vision: Users need adjustable font sizes (up to 200% or more), high-contrast color schemes, and reflow capability (text that adjusts to screen size rather than maintaining fixed layouts). PDF files are particularly problematic for low-vision users because they often use fixed layouts.
Color blindness: Affects approximately 8% of men and 0.5% of women. Interfaces must not rely on color alone to convey information (e.g., red/green status indicators need text labels or icons).

Motor Disabilities

Limited dexterity: Users may navigate entirely by keyboard, switch devices, or voice commands. Every function in your library platform — from searching the catalog to turning pages — must be operable without a mouse.
Tremors and precision difficulties: Touch targets must be large enough (at least 44x44 CSS pixels per WCAG 2.2) and spaced far enough apart to prevent accidental activation.

Cognitive and Learning Disabilities

Dyslexia: Affects 5-10% of the population. Users benefit from adjustable fonts (particularly OpenDyslexic or similar typefaces), increased line spacing, and the ability to customize background colors.
Attention disorders: Clean, distraction-free reading interfaces with minimal animations and the ability to hide non-essential UI elements.
Intellectual disabilities: Clear, simple navigation with consistent patterns. Avoid jargon in the library interface.

Auditory Disabilities

Deafness and hearing loss: Primarily relevant for audiobook content. Providing synchronized text (read-along) functionality or transcripts ensures audiobook content is accessible. Any video tutorials or onboarding content must have captions.

Platform Accessibility: What Your Lending System Must Support

Content accessibility is only half the equation. Your digital lending platform — the system through which readers discover, borrow, and read content — must itself be accessible. Here is what to evaluate and require:

Discovery and Borrowing Interface

Screen reader compatibility: All interface elements must have proper ARIA labels. Search results, filters, and book details must be announced correctly. Dynamic content updates (e.g., "added to your shelf") must use ARIA live regions.
Keyboard navigation: Every function must be operable via keyboard alone. Tab order must be logical. Focus indicators must be visible. Skip navigation links should allow users to jump past repetitive menu structures.
Responsive design: The interface must work at 200% zoom without horizontal scrolling or content loss. This is a WCAG AA requirement and critical for low-vision users.
Error handling: Form errors (login, search, filters) must be identified in text, not just color. Error messages must be specific and associated with the relevant field.

Reading Applications

The reading application is where accessibility matters most, because it is where users spend the majority of their time. Critical requirements:

Text reflow: Readers must be able to increase font size without losing content or needing to scroll horizontally. This rules out image-based PDFs for accessible lending.
Customizable display: Font family, font size, line height, margins, background color, and text color should all be adjustable. This is not a luxury feature — it is an accessibility requirement for users with dyslexia, low vision, and light sensitivity.
Screen reader support: The reading application must pass content to the operating system's accessibility layer. On iOS, this means VoiceOver support. On Android, TalkBack. On desktop, NVDA and JAWS.
Text-to-speech: Built-in TTS functionality provides an alternative for users who benefit from audio but are not using a full screen reader. High-quality TTS with adjustable speed and voice selection improves the experience significantly.
Navigation: Table of contents, page navigation, and search must be accessible to keyboard and screen reader users. The ability to place and return to bookmarks without a mouse is essential.

DRM and Accessibility

Digital Rights Management creates a specific tension with accessibility. Some DRM implementations actively block accessibility features:

Screen readers may be unable to access DRM-protected content
Text-to-speech may be disabled by publisher DRM settings
Copy-paste restrictions can prevent users from transferring text to assistive tools

When evaluating platforms, ensure that DRM does not override accessibility. The EAA explicitly requires that DRM mechanisms not block accessibility features. Your platform should allow TTS and screen reader access regardless of DRM status, while still protecting against unauthorized redistribution.

Content Accessibility: Ensuring Your Catalog Is Usable

Even with a fully accessible platform, inaccessible content will still exclude readers. Here is how to approach content accessibility in your catalog:

Audit Your Existing Catalog

Use automated tools to assess the accessibility of your current ebook collection:

Ace by DAISY — the standard tool for checking EPUB accessibility conformance. It generates detailed reports on violations and warnings.
EPUB Accessibility metadata — check whether your ebook files include accessibility metadata (schema.org properties like accessibilityFeature, accessibilityHazard, accessMode).
Manual testing — automated tools catch structural issues but miss contextual problems. Have a screen reader user test a sample of titles from each publisher to identify real-world barriers.

Work With Publishers

Most accessibility problems originate in the production process, not the distribution platform. Work with your publishers and aggregators to:

Require EPUB Accessibility 1.1 conformance in new acquisitions
Request accessibility metadata with all content deliveries
Identify publishers who already produce born-accessible content (the Global Certified Accessible program by Benetech certifies publishers who meet EPUB Accessibility standards)
Include accessibility requirements in licensing agreements

Prioritize Remediation

You will not fix every accessibility issue overnight. Prioritize based on:

High-usage titles first. If a title is in your top 100 most-borrowed list, its accessibility issues affect the most users.
Required reading and course reserves. For academic libraries, inaccessible course materials create immediate legal exposure.
Known user needs. If you have registered users who use assistive technology, prioritize the genres and subjects they access most.

Format Considerations

EPUB 3 is the most accessible ebook format when properly produced. It supports reflow, semantic markup, ARIA roles, media overlays (synchronized text and audio), and comprehensive metadata.
PDF is the most problematic format for accessibility. Fixed-layout PDFs do not reflow, and many academic PDFs are scanned images with no text layer. Tagged PDFs with proper reading order are accessible, but they are the exception, not the norm.
Audiobooks are inherently accessible to users with visual disabilities but inaccessible to users with hearing loss unless accompanied by synchronized text or transcripts.

Practical Steps: An Accessibility Roadmap for Your Library

Moving from "we know we should be accessible" to "we are accessible" requires a structured approach. Here is a phased roadmap:

Phase 1: Assess (Month 1-2)

Conduct a WCAG 2.1 AA audit of your current lending platform (use both automated tools and manual testing with assistive technology)
Run Ace by DAISY on a representative sample of your catalog (at least 50 titles from different publishers and formats)
Review your reading applications' accessibility features and VPAT documentation
Survey users with disabilities about their experience and barriers
Document all findings in an accessibility report with severity ratings

Phase 2: Remediate Critical Issues (Month 3-4)

Fix or escalate platform accessibility blockers (keyboard navigation, screen reader compatibility, missing labels)
Work with your platform vendor to address gaps in reading application accessibility
Begin requiring EPUB Accessibility 1.1 conformance in new content acquisitions
Add accessibility information to your catalog records so users can identify accessible content before borrowing

Phase 3: Build Sustainable Processes (Month 5-6)

Add accessibility criteria to your platform procurement and renewal evaluations
Train library staff on accessibility features so they can assist users
Create an accessibility statement for your digital library that describes current conformance level, known limitations, and a contact path for accessibility issues
Establish a feedback mechanism for users to report accessibility barriers

Phase 4: Optimize and Maintain (Ongoing)

Conduct annual accessibility audits
Test new platform releases and content formats for accessibility regression
Track accessibility metrics: percentage of catalog with accessibility metadata, number of accessibility-related support requests, resolution time for accessibility issues
Stay current with standards evolution (WCAG 3.0 is in development and will eventually replace 2.x)

The Business Case Beyond Compliance

Legal compliance is the floor, not the ceiling. There are compelling practical reasons to invest in accessibility beyond avoiding lawsuits:

Broader reach. Accessibility features benefit far more people than those with diagnosed disabilities. Adjustable text size helps aging readers. Text-to-speech helps language learners. High-contrast modes help anyone reading on a phone in bright sunlight. An accessible library platform serves more of your population, more effectively.
Better SEO and discoverability. Accessible content with proper semantic markup, alt text, and metadata is inherently more discoverable by search engines and AI systems. Investing in accessibility improves your catalog's findability.
Competitive differentiation. As accessibility regulations tighten, institutions that have already invested in accessibility will be ahead of those scrambling to comply. This applies to both your library's reputation and your leverage in platform procurement.
Quality indicator. Content and platforms that meet accessibility standards are, by definition, better structured, better documented, and more interoperable. Accessibility is a proxy for overall quality.

Choosing an Accessible Platform

When evaluating digital library platforms, ask these specific questions:

Does the platform provide a current VPAT (Voluntary Product Accessibility Template) documenting WCAG 2.1 AA conformance?
Do the native reading applications support VoiceOver (iOS/macOS), TalkBack (Android), and NVDA/JAWS (Windows)?
Can readers customize font size, font family, line spacing, margins, and color schemes in the reading applications?
Does the platform's DRM implementation allow screen reader and TTS access?
Does the discovery interface support full keyboard navigation?
Can the platform display and filter by EPUB accessibility metadata?
What is the vendor's accessibility roadmap and testing process?

A platform that cannot answer these questions clearly is a platform that will create accessibility problems for your institution.

Looking Ahead

Ebook accessibility is moving from a specialized concern to a baseline expectation. The convergence of the European Accessibility Act, evolving WCAG standards, and institutional policies means that inaccessible digital libraries will face increasing legal, reputational, and practical consequences.

The good news is that the tools, standards, and platforms to build an accessible digital library exist today. The question is not whether it is possible — it is whether your institution will prioritize it now or be forced to retrofit later.

Start with an audit. Build a roadmap. Choose platforms and content that meet current standards. And design for the readers who need accessibility most — because in doing so, you will build a better library for everyone.

Ready to build an accessible digital library? Learn how Publica.la supports institutional libraries with accessible reading experiences, or schedule a meeting to discuss your accessibility requirements.

Ebook Accessibility in Libraries: Standards, Compliance, and Best Practices