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qpdf vs pdfjam: catalog facts
qpdf	pdfjam
Free Free and open source under the Apache licence.	Free Free and open source under the GPL 2 license.
Windows, macOS, Linux, Command line	Command line
Rewrites PDF structure losslessly, which makes it ideal in pipelines Can dump and rebuild a PDF as JSON for scripted editing	N-up layouts, booklets and signatures for binding Accepts PDF, PostScript and image inputs
No rendering or text extraction; those need other tools Command line only	Requires a LaTeX installation Command line only, no graphical interface
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: GPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 24, 2026

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