PDF/A Format: What It Is and Why Government Agencies Require It

2026-04-05 · 5 min read

If you have ever submitted a document to a government agency, court system, or regulatory body and received a rejection because "the file must be in PDF/A format," you are not alone. PDF/A is a strict subset of the PDF specification, and understanding what it requires — and why — will save you significant frustration.

What Is PDF/A?

PDF/A is an ISO-standardized version of PDF designed specifically for long-term archiving. The "A" stands for Archive.

The core idea is simple: a PDF/A file must be self-contained and completely reproducible at any point in the future, regardless of what software or fonts happen to be installed on a given system. This means no external dependencies that could disappear over time.

PDF/A was developed in response to a real problem: ordinary PDFs can reference external fonts, embed multimedia content, link to external resources, and use encryption — all features that make the file impossible to reliably render decades from now if those dependencies vanish.

What PDF/A Prohibits

Converting to PDF/A means accepting several constraints:

No encryption: PDF/A files cannot be password-protected (an encrypted file could become permanently inaccessible)

No external content: All fonts, images, and color profiles must be fully embedded in the file

No JavaScript or executable content

No audio or video (in most PDF/A profiles)

No transparency in PDF/A-1 (this restriction was relaxed in later versions)

No LZW compression (patent concerns at the time of the original standard)

PDF/A-1a vs. PDF/A-1b vs. PDF/A-2

The PDF/A family has grown over the years:

PDF/A-1b (ISO 19005-1, Level B — Basic): Ensures reliable visual reproduction. The document will look the same when opened in the future. This is the minimum level required by most agencies.

PDF/A-1a (ISO 19005-1, Level A — Accessible): Everything in 1b, plus the document must be fully tagged for accessibility (logical reading order, alt text for images, proper heading structure). Required by agencies with accessibility mandates.

PDF/A-2 (ISO 19005-2): Based on PDF 1.7. Allows JPEG 2000 compression, PDF/A-compliant attachments, and transparency. Better for complex graphics.

PDF/A-3: Like PDF/A-2 but allows embedding arbitrary file attachments (including XML, CSV, etc.) — used in hybrid invoice formats like ZUGFeRD/Factur-X.

For most practical purposes — court filings, government submissions, HR records — PDF/A-1b is the correct target.

Who Requires PDF/A and Why

PDF/A is mandated in contexts where documents must be reliably stored and retrieved over very long periods:

Government archives and public administrations across the EU and many other jurisdictions

Courts and legal systems for case file submissions

Healthcare providers for patient records with multi-decade retention requirements

Financial institutions subject to regulatory document retention rules

Libraries and academic institutions for digital preservation

The European Commission, for example, specifies PDF/A for documents submitted through many of its digital portals. In Germany, the eJustice Act requires PDF/A for court filings.

How to Check if a PDF Is Already PDF/A Compliant

A PDF/A-compliant file contains a specific XMP metadata marker. You can inspect this in:

Adobe Acrobat (File → Properties → Description)

PDF validation tools like veraPDF (free, open source)

Most professional PDF editors

A file that was "saved as PDF" from Word or Chrome is almost certainly not PDF/A compliant without an explicit conversion step.

How to Convert a PDF to PDF/A With PDFree

PDFree offers a straightforward PDF/A conversion tool that handles the technical requirements automatically:

Go to pdfree.app/tools/pdf-a

Upload your existing PDF

Select the target PDF/A profile (PDF/A-1b for most use cases)

Download the converted, archive-ready file

Convert your documents to PDF/A before your next government submission — use the PDFree PDF/A converter and avoid rejection notices.