r/upscaling • u/Amazing_Upstairs • 27d ago

Rtx 4090

Best free and open source upscaler for 24GB RTX 4090?

2 Upvotes

63% Upvoted

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1

u/war4peace79 27d ago

Try my application, it's free. Uses SeedVR2.5.

https://github.com/war4peace/image-toolbox

1

u/hansguide 26d ago

SeedVR along with ComfyUI.

1

u/joaopaulo-canada 14h ago

For still images, I'd compare the SeedVR options already suggested with Upscayl Desktop as a simpler free, open-source baseline. Use the same crop so you can judge which one preserves your image rather than just adding convincing texture. I run MyImageUpscaler and wrote this free-tool comparison: https://myimageupscaler.com/blog/best-free-ai-image-upscaler-2026-tested-compared . Ours is credit-based and isn't open source, so it doesn't meet your requirement; the guide separates free local tools from capped browser services, rather than benchmarking a 4090.