Convert PDF to PDF/A (Archival Format) Online

A regular PDF is built to look right today, on whatever software created it. PDF/A is built to look right in fifty years, on software that hasn't been written yet. That distinction is why courts, government agencies, libraries, and records-retention teams specifically require PDF/A— a normal PDF that's technically valid can still fail an archival requirement.

What PDF/A actually locks down

PDF/A is an ISO standard (ISO 19005) built on top of the regular PDF spec, with a few key restrictions added specifically for long-term readability:

• Fonts must be embedded. A regular PDF can reference a font installed on the viewer's system; PDF/A embeds every font it uses, so text renders correctly even if that font no longer exists anywhere else.
• No encryption or passwords. An archived document that requires a password to open is a document that's unreadable the moment that password is lost.
• No external dependencies. Audio, video, JavaScript, and links to external files are disallowed — everything the document needs has to be self-contained inside the file.
• Explicit color and metadata. Color spaces and document metadata must be defined in a way that doesn't depend on assumptions a future viewer might not make.

Who actually needs this

Legal filings, government records, academic and library archives, and any regulated records-retention program (financial, healthcare, insurance) commonly specify PDF/A explicitly. If you've ever had a document rejected by a filing system with an error about "file format not compliant," PDF/A conformance is usually exactly what was missing.

How to convert a PDF to PDF/A

1. Open PDF to PDF/A and add your PDF file.
2. It's converted to PDF/A-2 on our server — fonts get embedded and any unsupported features (encryption, external references) are stripped.
3. Download the archival-ready PDF.

This is one of the few conversions on this site that can't run entirely in your browser — full PDF/A conformance checking and font-embedding needs a processing pipeline that isn't practical to ship as client-side JavaScript. Your file is uploaded, converted, and then deleted from our temporary storage within about two hours, whether or not you download the result — it's not kept beyond what it takes to process the job.

Before you convert

If your PDF has any structural damage — the kind that comes from repeated editing and re-saving by different tools — run it through Repair PDF first; PDF/A conversion works from a clean, well-formed source. And if the archival file needs to stay under a specific size limit for submission, Compress PDF afterward can trim it down without touching the PDF/A conformance.