What Is an Accessible eBook?
Why Accessible eBooks Matter?
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Inclusivity
Accessible eBooks play a role similar to braille in printed books. They make sure readers with disabilities can access information and participate fully in education and reading experiences. Without accessibility features, many digital books would remain difficult or impossible for some people to use.
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Market Expansion
Around the world, more than 1.3 billion people live with some form of disability. When publishers create accessible content, they open the door to a much wider audience. This means more readers can discover and engage with their books.
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Financial Growth
The global eBook market continues to grow every year. Forecasts suggest it could reach around US$14.92 billion in 2026. Accessibility allows publishers and content creators to reach a larger share of this growing market.
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Cost Efficiency
Designing eBooks to be accessible from the beginning often saves time and money. Fixing accessibility issues later usually requires additional editing, testing, and redevelopment work.
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Broader Distribution
Many academic institutions and public libraries now require digital content to meet accessibility standards before adding it to their collections. Creating accessible eBooks increases the chances of wider distribution.
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Legal Protection
Accessibility standards are also becoming part of regulatory requirements in many regions. Following these standards helps organizations avoid compliance risks and future legal complications.
Standards and Regulations That eBooks Must Follow
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EPUB3
EPUB3 is widely considered the standard format for accessible eBooks. It allows publishers to include meaningful structure and navigation within the book, making it easier for assistive technologies to interpret the content.
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WCAG 2.2 AA Standards
The Web Content Accessibility Guidelines provide detailed rules for making digital content usable for people with disabilities. Following the WCAG 2.2 AA level ensures that eBooks meet widely accepted accessibility requirements.
Read about WCAG 2.2 Guidelines
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ADA Title II
In the United States, ADA Title II requires public institutions and organizations to ensure their digital content is accessible to individuals with disabilities. This includes digital publications such as eBooks.
Read about ADA Title II
Essential Guidelines for Creating Accessible eBooks
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Choose the Right File Format
Using EPUB3 allows for better structure and compatibility with assistive technologies.
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Use Clear Semantic Markup and Structure
Headings, lists, and sections should be properly marked so screen readers can interpret the content correctly.
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Allow Adjustable Fonts and Text Size
Readers should be able to increase or decrease font sizes without breaking the layout.
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Create a Table of Contents
A structured table of contents helps readers navigate chapters and sections easily.
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Add Language Information
Defining the language of the content helps screen readers pronounce words correctly.
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Maintain Proper Color Contrast
Strong contrast between text and background makes content easier to read for people with visual impairments.
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Provide Alt Text for Images
Meaningful images should include descriptive alt text so readers using screen readers can understand what the image represents.
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Include Transcripts, Closed Captions and Extended Audio Descriptions for Videos
If the eBook contains video or audio content, transcripts, captions, and extended audio descriptions help ensure everyone can access the information.
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Use Descriptive Links
Links should clearly describe where they lead instead of using vague text such as “click here.”
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Ensure Screen Reader Compatibility and Text-to-Speech Support
The entire structure of the eBook should work smoothly with assistive reading tools.
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Consider DRM-Free Options
Some restrictive DRM systems can interfere with assistive technologies. Offering DRM-free access often improves usability for readers who rely on accessibility tools.
How to Test eBook Accessibility?
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Automated Testing
Automated tools can quickly scan an eBook and identify technical accessibility issues such as missing alt text, incorrect structure, or navigation problems.
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Manual Testing
Manual testing involves reviewing the eBook using screen readers, keyboard navigation, and other assistive tools. This helps identify real usability issues that automated systems might miss.
Many publishers combine automated checks with expert review for more accurate results. Continual Engine, for example, offers expert-led remediation and accessibility services that help organizations identify issues, fix them, and ensure ebooks meet accessibility standards. Combining automation with expert review ensures a more reliable result.
Closing Thoughts
Frequently Asked Questions (FAQs)
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What formats are best for accessible eBooks?
The most widely recommended format for accessible eBooks is EPUB3, as it supports semantic structure, navigation, and compatibility with assistive technologies.
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Can PDFs be made as accessible as eBooks?
Yes, PDFs can be made accessible by adding tags, alt text, proper reading order, and navigation elements. However, compared to EPUB, PDFs are generally less adaptable for different screen sizes and user preferences, which can impact usability.
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Are accessible eBooks required by law?
In many regions, accessibility is becoming a legal requirement. Laws such as the European Accessibility Act (EAA) and regulations under the ADA in the U.S. require digital content, including eBooks, to be accessible in certain contexts like education and public services.
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How often should eBooks be tested for accessibility?
Accessibility testing should be done:
- During development
- Before publishing
- After updates or revisions
Regular testing ensures that accessibility is maintained over time.
