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K2pdfopt vs krop: catalog facts
K2pdfopt	krop
Free Free to download; the developer states it is open source.	Free Free and open source under the GPLv3 or later.
Windows, macOS, Linux, Command line	macOS, Linux
Reflows multi-column and scanned PDFs for small screens Optional OCR layer on output	Splits pages into subpages for reading on e-readers Simple visual cropping interface
Graphical interface is built in only on Windows Releases are infrequent, the latest being v2.55 from December 2023	Cropped content remains in the file and is only hidden Mainly supported on Linux; macOS needs a manual pip install
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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