⌘K
We use cookies to improve your experience
We use essential cookies to make our site work. With your consent, we may also use non-essential cookies to improve user experience.
Definition
PDF/A is an ISO-standardized subset of PDF designed for long-term digital preservation of documents. It ensures that documents can be reproduced exactly the same way in the future by embedding all fonts, prohibiting encryption, and restricting certain features.
PDF/A (ISO 19005) was created to address a critical challenge in digital archiving: ensuring that documents remain readable decades or centuries from now. Standard PDFs can reference external fonts, use proprietary features, or depend on software that may not exist in the future. PDF/A eliminates these risks by requiring all resources to be self-contained within the file.
Key restrictions in PDF/A include: all fonts must be embedded (no references to system fonts), encryption and password protection are prohibited, JavaScript and executable content are forbidden, audio/video embedding is not allowed (in PDF/A-1 and PDF/A-2), and all color data must include ICC color profiles. These constraints ensure long-term reproducibility.
PDF/A is required by many government agencies, courts, and regulatory bodies for official document submission. The standard has evolved through several versions: PDF/A-1 (based on PDF 1.4), PDF/A-2 (based on PDF 1.7, adds JPEG2000 and transparency), and PDF/A-3 (allows embedding any file format as an attachment). Most PDF creation tools can output PDF/A-compliant documents.