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IceBox vs img2pdf: catalog facts
IceBox	img2pdf
Free Free and open source under the GPL-3.0 licence.	Free Free and open source.
Linux	Windows, macOS, Linux, Command line
Single purpose: images in, one PDF out Available as a Flatpak	Lossless conversion with no re-encoding of images Small output files
Does not edit or merge existing PDFs Small project with limited development history	Command line only, no graphical interface Only converts images to PDF, no editing
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
Not stated if an account is 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.