Compare software

pdfsizeopt vs Clop: catalog facts
pdfsizeopt	Clop
Free Free and open source.	Freemium Free to use, with a Clop Pro lifetime licence for 15 euros.
Windows, Linux, Command line	macOS
Lossless size reduction Docker image available	Optimises images automatically when copied Shrinks screen recordings right after recording
Command-line only Updates are infrequent	macOS 13 or later only Some features require Clop Pro
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: GPL-3.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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