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Master PDF Editor vs Stirling PDF: catalog facts
Master PDF Editor	Stirling PDF
Freemium An unregistered version offers limited non-commercial functions. Full editing requires a…	Freemium Free plan is $0/month with no card required (60+ tools, web/desktop/self-hosted, 500…
Windows, macOS, Linux	Windows, macOS, Linux, Web, Self-hosted
One of the few complete PDF editors with a real Linux build Handles forms, signatures and OCR alongside content editing	55+ PDF tools covering signing, converting, merging, editing, OCR and redaction, chained in a stateful workspace with… Runs on Docker, bare metal, Kubernetes or as native desktop apps for Windows, macOS and Linux
The unregistered version is limited and for non-commercial use only Closed source	Open-core: SSO, external database, Google Drive integration, SAML and audit logs are gated behind paid Team or… Manual server setup needs Java 25+ plus LibreOffice and Tesseract for conversions and OCR
Downloadable app	Self-hosted, Downloadable app, Web application, Hosted service
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 20, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.