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Real-ESRGANUpscaler
Free

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

 Free

Free and open source under the GPL-3.0 licence.

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

Checked September 22, 2026

Checked October 1, 2026

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