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