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PDF4QT vs word-sys's PDF Editor: catalog facts
PDF4QT	word-sys's PDF Editor
Free Free and open source; donations are accepted through GitHub Sponsors.	Free Free and open source under GPL-3.0-or-later.
Windows, Linux, Command line	Linux
Viewing and editing applications in one project Command-line tool for scripted PDF work	Edits text and images on PDF pages Can merge and reorder pages
No macOS version Mostly the work of a single principal developer	Linux only
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0-or-later
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 8, 2026

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