Stirling-PDF
The #1 Open-Source PDF Application on GitHub
- No reviews yetCategory: Dev ToolsUpdated Jun 2026
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Stirling-PDF stands out as a robust solution for PDF management, particularly in environments where security and compliance are paramount. Its open-source nature and free tier make it accessible, while its paid model for processing documents ensures scalability for larger organizations.
When to use it
- Businesses needing secure PDF processing
- Organizations with high document volume
- Users looking for a free PDF editing solution
Avoid if
- You need a fully-featured mobile app
- You prefer a completely free tool without usage limits
- You require extensive AI features
Free
Free tierOpen sourceAPI
Starts at $0.05 per document processed, with 500 free at sign-up. No credit card required.
- Free tierNative
- API accessNative
- Cloud syncNative
- Offline supportNative
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