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Upscaler vs ImgUpscaler: catalog facts
Upscaler	ImgUpscaler
Free Free and open source under the GPL-3.0 licence.	Freemium Free to start, with paid web plans for batch processing; the Upscal apps are licensed…
Linux	Web
Runs fully offline on your own machine Sandboxed with no internet access	2x and 4x upscaling in the browser Supports JPG, PNG, WebP and AVIF
Requires a Vulkan-capable GPU Linux only	Web subscription does not include the desktop or mobile apps Batch processing requires payment
Downloadable app	Web application
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Needs internet
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.