PDF to PDF/A-1a
Apply best-effort PDF/A-1a metadata — the strictest accessibility-aware archival profile, requiring tagged structure (best-effort claim).
1. Upload your file
How does the PDF to PDF/A-1a work?
Apply best-effort PDF/A-1a metadata to a PDF — the strictest accessibility-aware archival profile. Where PDF/A-1b only requires reproducible visual fidelity, 1A additionally requires a tagged structure tree (heading levels, reading order, alt-text on images, table semantics) so screen readers can navigate the archive faithfully. Honest about scope: this tool sets the document-level flags (MarkInfo /Marked = true, /Lang, XMP pdfaid:part=1, conformance=A) but does NOT author a structure tree from scratch — that requires re-authoring the source document with a tagging-aware tool (Word "Save as PDF" with accessibility on, LibreOffice Tagged PDF). For PDF/A-1b (visual-only) use the multi-level PDF/A Converter; for genuine 1A certification use Adobe Acrobat's Make Accessible workflow + veraPDF validation.
🔒 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
For heavier PDF workflows
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