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imgp vs Caesium Command Line Tools: catalog facts
imgp	Caesium Command Line Tools
Free Free and open source under GPL-3.0-or-later.	Free Free software under the Apache-2.0 license.
Command line	Windows, macOS, Linux, Command line
Resizes and rotates batches of images Can process directories recursively	Supports lossy and lossless compression Can resize images and target specific file sizes
Command-line interface only	GIF compression is lossy only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

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