Font Fix (callas software)

Automatically resolve font issues in PDF documents with callas software’s PDF technology

PDFix integrates callas software’s professional-grade font fixing capabilities to automatically repair common font problems that prevent PDF/UA compliance and cause accessibility validation failures. A Docker image utomatically detects and fixes font-related issues in PDF documents to improve compliance with PDF/UA and PDF/A standards. It embeds missing fonts, applies controlled font substitution, and corrects common CID, encoding, and glyph structure problems to ensure reliable rendering and accessibility.

Meet PDFix Desktop + Callas: Professional Font Remediation

• Free for Desktop, Paid SDK: Free use in PDFix Desktop; SDK integration requires licensing
• Local Processing
• Automatic Font Embedding
• PDF/UA Compliance
• Batch Processing
• Industry-Proven Technology

How It Works: Choose Your Path

For PDFix Desktop Users

Perfect for accessibility professionals, document specialists, and teams who prefer visual workflows.

• Download PDFix Desktop
• 🐳 Install Docker Desktop First!
• Open PDFix Desktop and pull the font fixing docker via Action Manager (one-time set up)
• Upload your PDF → External Actions → Fix Fonts (callas)

Note: Free unlimited use in PDFix Desktop for manual processing

For PDFix SDK Users

Perfect for automated workflows, print production systems, and enterprise document processing.

• Automated Pipeline Integration
  • Build callas font fixing into your document workflows, print production systems, or accessibility remediation pipelines using PDFix SDK
  • Note: SDK integration requires callas software licensing for commercial use.

• SDK Benefits
  • Automated font fixing in production workflows
  • Integrate with print management systems
  • Batch process unlimited document volumes

Local Processing Benefits

• 100% Local Processing
• No Cloud Dependencies
• No Third-Party Services
• Free for Desktop
• Enterprise-Ready
• Compliance-Safe

The Technology Behind It

• callas pdfToolbox engine
  • Developed by callas software GmbH, the engine provides comprehensive PDF analysis and correction capabilities

• PDFix integration
  • The Dockerized solution integrates callas professional-grade technology with PDFix workflows:
    • Embeds missing fonts
    • Applies controlled font substitution
    • Corrects common CID
    • Corrects encoding
    • Corrects glyph structure problems to ensure reliable rendering
    • Improve compliance with PDF/UA and PDF/A

Resources

• Getting Started Guide: https://pdfix.net/user-guide-external-actions/
• Docker: https://hub.docker.com/r/pdfix/font-fix-callas

Action

A Docker image automatically fix font issues in a PDF file. It uses a configuration file for customizable options and can be run with various command-line arguments.