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Real-ESRGANUpscayl
Free

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

 Free

Free and open source under the AGPL. There is no paid tier and no per-image cost.

Windows, macOS, Linux, Command line Windows, macOS, Linux
  • Dedicated model variants tuned for anime versus photo content
  • BSD-licensed and widely reused inside other tools and GUIs
  • Runs entirely on your own machine, so no images are uploaded anywhere
  • Batch processing for whole folders
  • Core project is a command-line library rather than a polished GUI app
  • No repository update reflected since mid-2024
  • Needs a Vulkan-compatible GPU; the project warns many integrated chips will not work
  • Slow on weaker hardware, and memory-hungry on large images
Downloadable app, Self-hosted Downloadable app
Open source Open source
License: BSD-3-Clause License: AGPL-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 September 21, 2026

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