PDF & EPUB Accessibility Remediation

PDF accessibility remediation is the process of making a PDF usable by people who rely on assistive technologies such as screen readers. It typically involves adding document structure and tags, defining a logical reading order, providing alternative text for images, structuring headings and tables, and validating the finished document against accessibility requirements.

A PDF is made accessible by giving the document a meaningful structure that assistive technologies can interpret. This includes correct tagging, headings, lists and tables, logical reading order, alternative text, document language and other accessibility information. The document should then be validated and reviewed to make sure the structure works as intended.

WCAG defines broader accessibility requirements for digital content, while PDF/UA is a PDF-specific ISO standard that defines how an accessible PDF should be structured. They address many of the same accessibility needs and are commonly used together, but meeting one does not automatically mean that all requirements of the other are met.

Many repetitive parts of PDF remediation can be automated, including document analysis, structuring, tagging and validation. More complex content may still require review and quality assurance, particularly for reading order, alternative text and complex document structures. Webarch helps automate repeatable remediation tasks while keeping review and approval within the workflow.

An accessible EPUB uses semantic structure, clear navigation, text alternatives, accessibility metadata and content that works with assistive technologies. EPUB accessibility builds on WCAG while adding requirements that are specific to digital publications and their discoverability.

Accessibility should be checked with a combination of automated validation and human review. For PDFs, this includes checking tags, reading order, alternative text and document structure. For EPUBs, accessibility testing should also cover navigation, metadata and compatibility with reading systems and assistive technologies. Automated checks are useful, but they do not replace evaluation of how the content actually works for readers.

Yes. Once document content is properly structured, it can be reused for multiple accessible outputs and publishing channels. With Webarch, structured content can support formats such as accessible PDF, EPUB, HTML, XML, audio and braille from the same underlying content.

The European Accessibility Act (EAA) sets accessibility requirements for certain products and services offered in the EU, including e-books and related services. For publishers and organizations, this can make accessible EPUBs and PDFs an important part of meeting accessibility requirements, depending on how the content is provided and used. Webarch helps structure and remediate content to support accessibility workflows based on standards such as WCAG, PDF/UA and EN 301 549.