Free Online PDF to PDF/A Converter
Convert your PDFs to long-term archival PDF/A format — 100% private and secure in your browser.
PDF to PDF/A
Upload one or multiple PDFs. They will be combined and converted to PDF/A archival format (embedded fonts & resources).
How to Convert PDF to PDF/A Online for Free in 2026
PDF/A is the ISO-standard archival format for long-term preservation of electronic documents. Unlike regular PDFs, PDF/A ensures fonts, colors, and images are fully embedded — so your files remain readable and identical even decades later.
Our free tool converts your PDFs (single or multiple) to PDF/A format entirely in your browser using PDF-Lib. Nothing is uploaded — total privacy guaranteed.
Key Features
- Multiple PDF Support: Combine & convert several files into one PDF/A.
- Full Resource Embedding: Fonts, images, and metadata preserved.
- Archival Compliance: Creates PDF/A-2b compatible output (most common archival level).
- Real-time Preview: See all input files before conversion.
- 100% Private: Client-side only — no server involved.
Common Use Cases
Legal contracts, court documents, medical records, financial reports, academic theses, government archives, family records — anything that must remain accessible for 20–100+ years.
Frequently Asked Questions
Is this PDF to PDF/A converter free?
Yes. 100% free, no limits, no registration, no watermarks.
Are my files safe and private?
Yes. Everything processes locally in your browser. Your PDFs never leave your device.
Is the output really PDF/A compliant?
It produces a PDF/A-2b compatible file with embedded resources. For strict official validation (e.g. courts), verify with tools like veraPDF or Adobe Acrobat Pro.
Can I convert multiple PDFs at once?
Yes! Upload as many as you want — they’ll be merged into one archival PDF/A file.