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PDF Tinkerer vs PDF4QT: catalog facts
PDF Tinkerer	PDF4QT
Free Free and open source under the LGPL-2.1-or-later license.	Free Free and open source; donations are accepted through GitHub Sponsors.
Linux	Windows, Linux, Command line
Creates new PDFs as well as modifying existing ones Open source under LGPL	Viewing and editing applications in one project Command-line tool for scripted PDF work
Linux only Small one-person project with little public documentation	No macOS version Mostly the work of a single principal developer
Downloadable app	Downloadable app
Open source	Open source
License: LGPL-2.1-or-later	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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