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