QPDF version 11.9.1

Welcome to the QPDF documentation! For the latest version of this documentation, please visit https://qpdf.readthedocs.io.

Contents:

• What is QPDF?
• License
• Downloading QPDF
• Building and Installing QPDF
  • Dependencies
  • Build Instructions
  • Build Options
  • Crypto Providers
  • Converting From autoconf to cmake
• Notes for Packagers
  • Build Options
  • Package Tests
  • Packaging Documentation
• Running qpdf
  • Basic Invocation
  • Exit Status
  • Shell Completion
  • Help/Information
  • General Options
  • Advanced Control Options
  • PDF Transformation
  • Page Ranges
  • PDF Modification
  • Encryption
  • Page Selection
  • Overlay and Underlay
  • Embedded Files/Attachments
  • PDF Inspection
  • JSON Options
  • Options for Testing or Debugging
  • Unicode Passwords
• QDF Mode
• Using the QPDF Library
  • Using QPDF from C++
  • Using QPDF from other languages
  • A Note About Unicode File Names
• Weak Cryptography
  • Definition of Weak Cryptographic Algorithm
  • Uses of Weak Encryption in qpdf
  • Uses of Weak Hashing In QPDF
  • API-Breaking Changes in qpdf 11.0
• qpdf JSON
  • Overview
  • JSON Terminology
  • What qpdf JSON is not
  • qpdf JSON Format
  • JSON Compatibility Guarantees
  • JSON: Special Considerations
  • Changes from JSON v1 to v2
• Contributing to qpdf
  • Source Repository
  • Code Formatting
  • Automated Tests
  • Personal Comments
• Design and Library Notes
  • Introduction
  • Design Goals
  • Helper Classes
  • Implementation Notes
  • QPDF Object Internals
  • Casting Policy
  • Encryption
  • Random Number Generation
  • Adding and Removing Pages
  • Reserving Object Numbers
  • Copying Objects From Other PDF Files
  • Writing PDF Files
  • Filtered Streams
  • Object Accessor Methods
  • Smart Pointers
• QPDFJob: a Job-Based Interface
  • QPDFJob Design
• Linearization
  • Basic Strategy for Linearization
  • Preparing For Linearization
  • Optimization
  • Writing Linearized Files
  • Calculating Linearization Data
  • Known Issues with Linearization
  • Debugging Note
• Object and Cross-Reference Streams
  • Object Streams
  • Cross-Reference Streams
  • Implications for Linearized Files
  • Implementation Notes
• PDF Encryption
  • PDF Encryption Concepts
  • PDF Encryption Details
  • PDF Security Restrictions
  • How qpdf handles security restrictions
  • User and Owner Passwords
• Release Notes
• Acknowledgments

Indices

• qpdf Command-line Options