AccessiblePDF vs PAC (PDF Accessibility Checker)

AccessiblePDF is a web service from Palanisi Labs LLC for remediating PDF files. It tags uploaded PDFs, including scans, runs checks with veraPDF, and returns PDF/UA-1 files. A free compliance check is available before paid remediation. OCR for image-only pages is included in the $0.50, paid once plan, billed at $0.50 per page with no minimums. Results can include a tagged PDF with a PDF/UA identifier, bookmarks, before-and-after validation results, and a plain-English change list; accessible HTML is available on request. The Tag Editor places a live page beside its tag tree for editing reading order, tables, lists, headings, and alt text, with screen-reader preview and revalidation. Other plans cover manual remediation and team use. The service lists WCAG 2.1 AA, PDF/UA-1, Section 508, ADA Title II, EN 301 549, and AODA. Processing uses US regions, AES-256 at rest, and TLS 1.2+ in transit.

PAC (PDF Accessibility Checker) is a free Windows desktop application for assessing PDF accessibility. Its Free plan costs nothing and includes PDF/UA and WCAG checks, quality checks, and AI-assisted checks. PAC covers WCAG 2.2 and combines automated scans with manual review tools. It also provides remediation guidance for addressing accessibility issues. The application is made by PAC (PDF Accessibility Checker), founded in 2010 and headquartered in Zurich, Switzerland. Windows is the listed platform. Mobile testing, a browser extension, and CI/CD integration are not included among its capabilities. The stated product scope is PDF accessibility checking, with checks aimed at PDF/UA and WCAG requirements rather than broad application testing. For Windows users reviewing PDF files, the free plan brings automated analysis, reviewer-led assessment, quality checks, AI-assisted checks, and guidance for remediation into one desktop application. Its feature set is focused on document accessibility rather than multi-platform testing.