PDF/A is the ISO standard for long-term document archiving, and for many institutions it is not optional. Court e-filing systems, university thesis repositories, government tender portals and records-management policies frequently require it — and reject anything else.
The standard exists because an ordinary PDF can depend on things that will not exist in twenty years: a font installed on the author's machine, an external colour profile, an embedded video codec. PDF/A forbids all of that. Everything needed to reproduce the page must live inside the file.
How to use PDF to PDF/A
- 1Upload the PDF you need to archive or file.
- 2Convert — fonts are embedded, external dependencies resolved and prohibited features removed.
- 3Review the conversion report for anything that had to be changed.
- 4Download the PDF/A file and submit it.
What conversion changes
All fonts are fully embedded, colour is defined against an embedded output intent rather than the viewer's assumptions, transparency is flattened where the target level requires it, and prohibited elements — JavaScript, embedded audio and video, external file references and encryption — are stripped out.
Why encryption and PDF/A are incompatible
An archival file must be readable indefinitely without a key that may be lost. The standard therefore forbids encryption entirely. If your document is password-protected, unlock it before converting, and control access at the storage layer instead.
Archiving as a habit
Even where it is not mandated, PDF/A is a sensible default for anything you expect to read again in a decade: signed contracts, compliance records, academic work and company registers.
Supported formats, limits and things to know
- Encrypted documents must be unlocked first — PDF/A prohibits encryption.
- JavaScript, multimedia and external references are removed.
- Fonts with licences that forbid embedding may be substituted.
- Converted files are usually somewhat larger because everything is embedded.
PDF to PDF/A — frequently asked questions
What is PDF/A and why do I need it?
It is the ISO standard for archival PDFs. Everything needed to render the page is embedded in the file, so it will still display correctly decades from now. Courts, universities and government portals often require it.
Will my document look different afterwards?
Visually it should be identical. The changes are internal — embedded fonts, defined colour handling and removal of features the standard forbids.
Can a PDF/A file be password protected?
No. The standard prohibits encryption, because an archival document must remain readable without a key.
Why is my PDF/A file bigger?
Full font embedding and an embedded colour profile add weight. That self-containment is the entire point of the format.
Can I still edit a PDF/A?
Yes, but editing and re-saving in a non-conforming tool can break compliance. Keep the source document and re-convert after edits.