PDF/A is a specialized version of PDF designed for long-term digital archiving. Government agencies, legal firms, and corporations use PDF/A to ensure documents remain readable decades from now. This guide explains the format and how to convert.
What Is PDF/A and Why Does It Matter?
PDF/A (ISO 19005) is an archival subset of PDF that guarantees the document can be reproduced exactly the same way in the future. It requires all fonts to be embedded, prohibits encryption, and disallows external content dependencies.
Regular PDFs might reference external fonts, contain JavaScript, or depend on features that could become unavailable over time. PDF/A eliminates these risks by making the document entirely self-contained.
Many industries require PDF/A: government records, legal filings, medical records, financial archives, and engineering documentation.
Convert with PDF Alone
Upload your standard PDF to PDF Alone's PDF to PDF/A converter. The tool embeds all fonts, removes prohibited features (JavaScript, encryption, external references), and validates the output against PDF/A standards.
PDF/A Versions Explained
PDF/A-1b: Basic conformance — ensures visual reproducibility. The most widely supported level.
PDF/A-2b: Adds JPEG2000 compression, transparency support, and PDF attachment embedding.
PDF/A-3b: Allows any file format to be embedded as an attachment (e.g., embedding the original Word file inside the PDF/A).
For most use cases, PDF/A-1b or PDF/A-2b is sufficient. Check with your organization for specific requirements.