Stirling PDF

#1 PDF Application on GitHub that lets you edit PDFs on any device anywhere

Why it is included

Deploy our secure application, API, or AI Agent to process sensitive documents on your own infrastructure. Air-gapped & Open Source. Trusted by 55K companies and 75% of the Fortune 500.

Best for

Users exploring vetted FOSS alternatives in this space (document modifier).

Target users

Developers, teams, and individuals evaluating open tools in this category — refine in CMS for specificity.

Strengths

~76,165 GitHub stars (per upstream list)
Open source

Limitations

Verify license, platform support, and security posture for your environment.

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