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YOGA Image Optimizer vs Curtail: catalog facts
YOGA Image Optimizer	Curtail
Free Free and open source under the GPL-3.0 licence.	Free Free and open source under the GPL-3.0-or-later.
Windows, Linux	Linux
Simple drag and drop workflow Converts between JPEG, PNG and WebP	Handles PNG, JPEG, WebP and SVG Uses proven tools like oxipng and pngquant
JPEG optimization is slow and memory hungry Small gains when optimizing WebP files	Linux only Compression only, no other editing
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0-or-later
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 1, 2026

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