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Upload a PDF and test it against the full PDF/UA-1 accessibility standard — the PDF baseline behind WCAG and Section 508. Every failed rule explained in plain English, with the pages affected, links to the exact specification clause, and how to fix it.
Drop your PDF here, or
Choose a PDFUp to 25 MB · analyzed in memory and deleted immediately — never stored
The check runs the complete machine-checkable rule set of PDF/UA-1 (ISO 14289-1) using the open-source veraPDF validation engine — the same validator used by archives, governments and the PDF industry. That includes:
Honest caveat: automated checks are the necessary baseline, not the whole job. No tool can judge whether your alt text is meaningful or your reading order makes sense — that part is still on the author. But a document that fails these machine checks is definitely not accessible.
Yes — upload a PDF and get the full report, free, with no account and no sign-up. It's built by ReflowPDF, the PDF editor whose exports pass these same checks by default.
It is validated in memory and deleted immediately after the check. Nothing is stored, logged, shared, or used for anything else — the report you see is the only output.
PDF/UA-1 (ISO 14289-1) by default — every machine-checkable rule, using the open-source veraPDF validation engine trusted across the industry. You can also switch the check to PDF/UA-2 (ISO 14289-2, for PDF 2.0 documents) or Well-Tagged PDF 1.0 before uploading. PDF/UA is the PDF-specific accessibility standard that underpins WCAG and Section 508 compliance for PDF documents.
A pass/fail verdict, a score, and every failed rule — explained in plain English, prioritized (critical → serious → minor), with the affected pages highlighted on page thumbnails, a link to the exact rule in the PDF/UA-1 reference, the relevant W3C technique, and concrete guidance on how to fix it.
Not yet — ReflowPDF exports conform to PDF/UA-1, and PDF/UA-2 export is on our roadmap. For honest context: PDF/UA-2 (ISO 14289-2) was only published in 2024, and as of 2026 almost no authoring tool produces it — mainstream editors, Office and DTP suites all still target PDF/UA-1, which is also what Section 508 reviews and EU procurement checklists reference in practice. This checker can already validate against PDF/UA-2 and Well-Tagged PDF 1.0, so you can test files from any tool.
For most documents the fastest path is to rebuild them in a tool that produces tagged, accessible output natively. ReflowPDF exports tagged, PDF/UA-1 compliant PDFs by default — structure tree, headings, table headers, alt text prompts, language and Unicode mappings all handled — and its built-in Accessibility panel shows remaining issues live while you edit.
It covers the machine-checkable PDF/UA-1 rules — the same class of checks — but runs free in your browser with no install. Note that no automated tool (including Acrobat's) can verify judgment calls like whether alt text is meaningful; automated checks are a necessary baseline, not the whole job.