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PDF Accessibility SDK – Getting Started Guide

Automate PDF/UA & WCAG Compliance

Introduction to PDFix SDK

PDFix SDK is a powerful cross-platform PDF processing tool that enables developers to automate PDF accessibility, extract data, and convert documents programmatically. Choose between Command-Line Interface (CLI) or API integration in multiple programming languages.

System Requirements

Trial License and Limitations

Test PDFix SDK with a free trial license:

  • Extracted text may include “*” placeholders
  • Saved PDFs may contain a PDFix watermark

How to Integrate PDFix SDK

Quickly process PDFs without coding using the PDFix CLI. Example command for automated PDF accessibility:

$ ./pdfix_app make-accessible -i test.pdf -o output.pdf

For Developers

To integrate the PDFix SDK programmatically using the API, refer to the code examples on GitHub in your preferred programming language:

Code Examples:

  • C++ – Native applications
  • .NET – For .NET Framework, .NET Core, and .NET 5+
  • Java – For Maven or Gradle projects
  • Python – Applications
  • JavaScript – For frameworks like Node.js, React.js, Angular, and similar

Practical Use Cases for PDF Automation

1. Fix PDF Accessibility Issues

Make documents WCAG and PDF/UA compliant using:

See PDF Accessibility Code Examples using the API.

2. Extract PDF Content

To extract the data from a PDF document a conversion to JSON. The data extraction can methods can provide:

  • Raw Data Extraction to access:
    • Document Metadata, Form Fields, and classification such as tagged, signed, secured
    • Page Size, Rotation, Annotations, Content including text, images, positions, colors
  • Layout Recognition to access the logical structure in non-tagged documents such as:
    • Paragraphs,
    • Headings,
    • Figures,
    • Tables,
    • Headers, Footers
  • Document Structure from a tagged document to access:
    • Complete document structure tree and elements with
      • Properties, Attributes
      • Position, Content, Style, etc.

See the CLI or Code Examples to convert a PDF to JSON.

3. Convert PDF to HTML (3 Methods)

  • Original Layout: Preserves original layout and exact design
  • Responsive Layout: Adapts for mobile screens (uses Layout Recognition)
  • Tags-Based Conversion: True web presentation of a tagged documents

See the CLI or Code Examples to convert a PDF to HTML.

Multi-Threaded Environments

PDFix SDK operates in a single-threaded manner, allowing only one API method to run at a time within a single process. Any additional method calls from other threads will be queued until the current operation finishes.

For best performance using parallel processing on a single server, use separate processes rather than threads.

Flexible Licensing

We offer flexible licensing plans based on:

  • Volume Licensing: Plan based on the number of processed pages.
  • Flat Licensing: Based on the number of concurrently executed threads, ideal for high-volume processing.

For more details, refer to PDFix SDK License Management.

Need a custom license? Contact us.

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