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pdfsizeopt vs PDF Tricks: catalog facts
pdfsizeopt	PDF Tricks
Free Free and open source.	Free Free and open source under the GPL-3.0.
Windows, Linux, Command line	Linux
Lossless size reduction Docker image available	Compress PDFs at several resolution levels Split by page ranges and merge multiple files
Command-line only Updates are infrequent	Linux only Limited to a few basic operations, no page editing or annotation
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	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.