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JPEGmini vs Caesium Image Compressor: catalog facts
JPEGmini	Caesium Image Compressor
Freemium The free version allows 50 images per day after the 7-day Pro trial; Pro is a one-time…	Free Free and open source under the GPL.
Windows, macOS	Windows, macOS, Web
Batch processes images Supports JPEG and HEIC image optimization	Batch processing with visible before and after sizes for the whole folder Resize at the same time as compressing, in one pass
Paid purchase required for continued Pro use The trial limits processing to 50 images per day after seven days	No official Linux binary; you compile it or use a third-party build Windows 10 build 1809 or later and macOS 12 or later, 64-bit only
Downloadable app	Downloadable app, Web application
Closed source	Open source
License not stated	License: GPL-3.0
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 8, 2026	Official website Full listing and sources Checked September 21, 2026

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