ISO standards, test suites, best-practice guides…

The PDF Association publishes a variety of documents and other resources for those interested in leveraging PDF technology, and as of Q4 2021, also sells the ISO standards relating to PDF technology as developed by ISO TC 171 SC 2.

In addition to formal ISO standards many PDF Association publications developed through our publications process are freely available.

PDF Association members may access process documents and drafts of upcoming ISO standards via the Member Area.


ISO 32000 (PDF)

PDF 2.0

ISO 32000 is the family of ISO standards that defines the core PDF specification for both PDF 1.7 and PDF 2.0.

ISO 32000-2 Document management Portable Document Format Part 1 PDF 2.0 cover with PDF Association logo



RFC 8118 (application/pdf Media Type)

RFC 8118 defines the application/pdf Media Type and provides an overview of PDF fragment identifiers.

PDF icon with upper right corner folded down and red arrow pointing right and gray arrow pointing left

PDF 3D Formats

PDF 1.7 introduced interactive 3D support using the U3D file format. PDF 2.0 expanded 3D support to include the ISO PRC format, and an ISO extension will soon be published supporting STEP (AP242) 3D models.

ISO 14739-1 Document management - 3D use of Product Representation Compact (PRC) format Part 1 PRC 10001 cover with PDF Association logo

ISO 16684 (XMP)

ISO 16684 is the ISO family of standards that defines XMP (eXtensible metadata platform) for XML-based metadata. XMP is widely used across PDF and other file formats, and is mandated by many ISO PDF subsets.

ISO 16684-1 Graphic technology - extensible metadata platform with PDF Association logo (XMP) - Part 1: Data model cover

ISO 19444 (XFDF)

ISO 19444 specifies an XML format for representing forms data and annotations in ISO 32000-2 (PDF 2.0). It is the XML equivalent of FDF.

ISO 19444-1 Document management XML Forms Data Format Part 1 Use of ISO 32000-2 XFDF 3.0 cover with PDF Association logo

ISO 21757 (ECMAscript for PDF)

ISO 21757-1 defines the ECMAScript API for automating and interacting with the 2D and 3D content in PDF 2.0 documents.

ISO 21757-1 Document management ECMAScript for PDF Part 1 Use of ISO 32000-2 PDF 2.0 cover with PDF Association logo

ISO 23504 (PDF/R)

PDF/R defines a small subset of ISO 32000 suitable for storage, transport and exchange of multi-page raster-image (scanned) documents.

ISO 23504 Document management applications Raster image transport and storage Part 1 Use of ISO 32000 PDF/R-1 cover with PDF Association logo

PDF Declarations

PDF Declarations facilitate a machine-readable notification that a PDF file (and/or its contents) conform to a given 3rd party specification.

The cover of PDF Declarations

Deriving HTML from PDF

This document describes an algorithm for producing conforming HTML from a well-tagged PDF document. HTML was chosen as a derivation target because HTML is consumed on all platforms and supported by all major vendors.

Cover of Deriving HTML from PDF.

PDF/Raster 1.0

This document describes PDF/raster, a strict subset of the PDF file format designed for storing, transporting and exchanging multi-page raster-image documents.


ISO 14739 (PRC)

ISO 14739-1 (PRC) describes the product representation compact (PRC) file format for three dimensional (3D) content data.

ISO 14739-1 Document management - 3D use of Product Representation Compact (PRC) format Part 1 PRC 10001 cover with PDF Association logo