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pdfjam vs PDFtk Server: catalog facts
pdfjam	PDFtk Server
Free Free and open source under the GPL 2 license.	Freemium Free for non-commercial use. A commercial licence is required otherwise.
Command line	Windows, macOS, Linux, Command line
N-up layouts, booklets and signatures for binding Accepts PDF, PostScript and image inputs	Terse, stable syntax that is easy to script Fills PDF forms from FDF data, which few command-line tools do
Requires a LaTeX installation Command line only, no graphical interface	Commercial use requires a paid licence Development has been slow, and packaging varies by platform
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
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 September 24, 2026	Official website Full listing and sources Checked September 22, 2026

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