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pdfsizeopt vs PDF Squeezer: catalog facts
pdfsizeopt	PDF Squeezer
Free Free and open source.	Paid Sold as a paid app; the homepage does not list the price.
Windows, Linux, Command line	Windows, macOS, iOS
Lossless size reduction Docker image available	Drag-and-drop compression with little setup Available on Mac, iOS and Windows
Command-line only Updates are infrequent	Focused on compression rather than general PDF editing Price not stated on the homepage
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
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 September 23, 2026

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