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indiPDF vs word-sys's PDF Editor: catalog facts
indiPDF	word-sys's PDF Editor
Paid A one-time $35 lifetime licence, with a free trial download.	Free Free and open source under GPL-3.0-or-later.
Windows, Linux	Linux
Annotations saved as standard PDF objects readable in other viewers Page organizing, merging and splitting built in	Edits text and images on PDF pages Can merge and reorder pages
Proprietary and paid after the trial No macOS version	Linux only
Downloadable app	Downloadable app
Closed source	Open source
License: Proprietary	License: GPL-3.0-or-later
Not stated if an account is 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.