Validate PDFs against WCAG 2.2 and PDF/UA requirements in seconds.
Get structured results that help teams identify issues and prioritize next steps faster.
Integrate accessibility checks into QA, publishing, and remediation workflows with REST APIs.
As PDF volumes grow, manual accessibility checks become harder to manage consistently and more prone to errors. PREP’s PDF Accessibility Checker API was built to turn document accessibility validation into a seamless, automated workflow. Backed by PREP, a platform that has remediated 55M+ pages, it helps teams validate with more accuracy, consistency, and control.
Minimize manual checks. No fragmented review. Just one API that fits into your existing workflows and keeps validation moving.
Supports validation against WCAG 2.2 and PDF/UA requirements.
From document structure to tables, forms, and alternate text, PREP’s Accessibility Checker API surfaces the accessibility issues teams need to review in one clear report.
Title, bookmarks, accessibility permissions, reading order, color contrast, headings, metadata, natural language, role maps, structural errors, fonts (embedded, Unicode mapping)
Navigation links, footnotes and references
Headers, scope, summary, and structure
Nested form fields and field descriptions
Figures, formulas, and linked elements
Tagged content, tagged annotations, multimedia, character encoding, and PDF syntax
Run checks on course materials, research documents, publications, and reports before they are shared or published.
Validate policy documents, public notices, records, and regulatory PDFs with fast, consistent accessibility checks.
Support automated accessibility validation across high volume PDF workflows used to manage and publish business critical documents.
Verify PDF content of any type or nature, at scale before it is distributed, published, or made available to users.
Get access to PREP's Accessibility Checker API
Send your PDF for validation
Receive a tracking ID
Check status as processing completes
Retrieve your accessibility report
| Capability | PREP Accessibility Checker API | Other Checkers |
|---|---|---|
| Standards Compliance | Built-in validation for WCAG 2.1/2.2 and PDF/UA, ensuring audit-ready outputs with the option to choose between the two. | Partial support; often requires multiple tools to achieve compliance. |
| Depth of Analysis | 100+ accessibility checks across tables, forms, annotations, fonts, and complex layouts. | Limited coverage; struggles with complex or hybrid PDFs. |
| Automation & Scale | API-first architecture enabling bulk processing (hundreds to thousands of PDFs per day) with minimal manual effort. | Typically manual or limited automation; not designed for high-volume workflows. |
| Workflow Integration | Seamlessly integrates with CMS, LMS (e.g., Canvas), S3, FTP, and document pipelines. | Integration is often custom, fragmented, or requires additional engineering effort. |
| Reporting & Insights | Actionable reports with accessibility scores, issue categorization (auto-fix vs manual), and structured outputs (JSON). | Basic reporting with limited insights and minimal actionability. |
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