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

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