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IceBox vs JPEG2PDF: catalog facts
IceBox	JPEG2PDF
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-3.0-or-later licence, with an optional donation page.
Linux	Linux
Single purpose: images in, one PDF out Available as a Flatpak	Converts images to PDF locally Light and dark themes
Does not edit or merge existing PDFs Small project with limited development history	Small project with little recent activity Linux only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-or-later
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.