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