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UpscalerReal-ESRGAN
Free

Free and open source under the GPL-3.0 licence.

 Free

Free and open source under the BSD-3-Clause license.

Linux Windows, macOS, Linux, Command line
  • Runs fully offline on your own machine
  • Sandboxed with no internet access
  • Dedicated model variants tuned for anime versus photo content
  • BSD-licensed and widely reused inside other tools and GUIs
  • Requires a Vulkan-capable GPU
  • Linux only
  • Core project is a command-line library rather than a polished GUI app
  • No repository update reflected since mid-2024
Downloadable app Downloadable app, Self-hosted
Open source Open source
License: GPL-3.0 License: BSD-3-Clause
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked October 1, 2026

Checked September 22, 2026

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