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Optimizt vs imgp: catalog facts
Optimizt	imgp
Free Free and open source under the MIT license.	Free Free and open source under GPL-3.0-or-later.
Command line	Command line
Supports PNG, JPEG, GIF, and SVG compression Can generate AVIF and WebP versions of raster images	Resizes and rotates batches of images Can process directories recursively
Designed for command-line image processing	Command-line interface only
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-3.0-or-later
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.