What language code should I use?

Standard BCP-47 codes: en-US, en-GB, fr, de-DE, es-MX, ja, zh-Hans, etc. Pick the language of the document body text.

Will this pass PDF/UA-1 strict validation?

Document-level checks: yes. Structure-tree checks: only if the source already has a tagged tree. We say so honestly in the result summary.

Does it change the visible content?

No — only metadata and the catalog's /MarkInfo and /Lang flags are touched.

PDF/UA Converter

Apply PDF/UA accessibility flags — document language, tagged-marked flag, and PDF/UA XMP metadata — for a best-effort accessibility pass.

Your files never leave your browser. All processing happens on your device — nothing is uploaded.

1. Upload your file

How does the PDF/UA Converter work?

PDF/UA is the international accessibility standard for PDF — it tells assistive technology how to read the document. True PDF/UA compliance requires a tagged structure tree (headings, paragraphs, alt text) that can only be authored at source-document time. This tool applies the document-level half of the standard: it sets the document language, marks the doc as tagged via /MarkInfo, ensures a Title is present, and embeds a PDF/UA XMP metadata claim. The result is a noticeably more accessible PDF and a baseline that PDF/UA validators will accept on the document-level checks. For full conformance, also run the source through a tagging-aware authoring tool (Word "Save as PDF" with accessibility on, LibreOffice Tagged PDF export).

🔒 Security & Privacy

All processing happens on your device. Your files never leave your browser, never touch our servers, and are not stored anywhere. Close the tab and the file is gone.

📱 Use it on any device

Works in any modern browser — Mac, Windows, Linux, iPhone, Android, and tablets. No installation, no app to download. Just open the page and start.

⚡ Quick & easy

Drag, drop, click. Most files process in seconds, not minutes. No watermarks added to your output, no per-day limits, and the tool always shows the result before asking you to download.

🎁 Always free, no signup

Free to use, every time. No account creation, no email required, no “trial” that converts to a paid plan. We make money from ads so you don’t have to pay.

Frequently asked

It is a meaningful improvement: the document language and title are what screen readers announce first. Full reading-order tagging requires source-doc authoring — see the Section 508 Check tool for a checklist of what is missing.