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What is PDF/A and When Do You Need It? Complete Guide

·6 min min read·pdfaarchivingisolegalpdf

PDF/A is the ISO 19005 standard for long-term archiving of PDF documents. It is required for official submissions to public administrations, legal filings, and any document that must remain readable and unaltered for decades.

PDF/A vs regular PDF — key differences

| Feature | Regular PDF | PDF/A | |---------|------------|-------| | Font embedding | Optional | Mandatory | | Encryption | Allowed | Not allowed | | JavaScript | Allowed | Not allowed | | External references | Allowed | Not allowed | | Color profiles | Optional | Required | | XMP metadata | Optional | Mandatory | | Long-term readability | Not guaranteed | Guaranteed |

When is PDF/A required?

  • Public administration (PA) — submissions to municipalities, cadastre, land registry, building permits
  • Legal filings — court submissions in Italy and the EU
  • Certified email (PEC) — attachments for official digital correspondence
  • Building permits and SCIA — technical documentation for construction projects
  • Medical records — long-term patient document storage
  • Banking and insurance — contract archiving

PDF/A versions explained

  • PDF/A-1b — basic visual conformance (most common, accepted everywhere)
  • PDF/A-1a — full conformance including tagged structure
  • PDF/A-2b — based on PDF 1.7, supports transparency and JPEG 2000
  • PDF/A-3b — allows embedding of any file type as attachment

For most use cases, PDF/A-1b is sufficient.

How to convert PDF to PDF/A for free

  1. Open PDF to PDF/A on FileFlip
  2. Upload your PDF file
  3. Click "Convert to PDF/A"
  4. Download the PDF/A file

The tool adds all required XMP metadata, OutputIntent sRGB, and removes JavaScript. Your file never leaves your browser.

How to verify a PDF/A file

Use veraPDF — the free open-source validator developed with support from the European Commission. Upload your converted file and check the validation report.

Frequently asked questions

What is PDF/A used for? PDF/A is used for long-term archiving of documents that must remain readable and legally valid over time, independent of future software versions.

Is PDF/A required in Italy? Yes. The Italian Digital Administration Code (CAD) requires PDF/A for official document submissions to public administrations.

What is the difference between PDF/A-1b and PDF/A-2b? PDF/A-1b is based on PDF 1.4 and is the most widely accepted version. PDF/A-2b is based on PDF 1.7 and supports transparency layers and JPEG 2000 compression.

Can I convert a scanned PDF to PDF/A? Yes, as long as the PDF is not encrypted. Scanned PDFs (image-only) can be converted to PDF/A — they will be visually conformant even without searchable text.

Is PDF/A the same as PDF/X? No. PDF/X is a standard for print production. PDF/A is for archiving. They serve different purposes.

How do I know if my PDF is already PDF/A? Open it in Adobe Acrobat or validate it with veraPDF. FileFlip also adds a PDF/A identifier to the document metadata that PDF readers can detect.

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