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krop vs K2pdfopt: catalog facts
krop	K2pdfopt
Free Free and open source under the GPLv3 or later.	Free Free to download; the developer states it is open source.
macOS, Linux	Windows, macOS, Linux, Command line
Splits pages into subpages for reading on e-readers Simple visual cropping interface	Reflows multi-column and scanned PDFs for small screens Optional OCR layer on output
Cropped content remains in the file and is only hidden Mainly supported on Linux; macOS needs a manual pip install	Graphical interface is built in only on Windows Releases are infrequent, the latest being v2.55 from December 2023
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License not stated
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.