ssitu/ComfyUI_UltimateSDUpscale

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1547 stars · 120 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A ComfyUI custom node pack implementing the Ultimate Stable Diffusion Upscale script, which runs image-to-image diffusion on large images in tiles. It improves detail on upscaled images while keeping memory requirements low and image sizes within the model's training range.

Use cases

• upscale a stable diffusion image to large sizes without running out of VRAM
• add fine detail to low-resolution AI-generated images
• run tiled img2img diffusion on a big picture in ComfyUI
• enlarge AI art for printing while preserving sharpness
• replace plain upscaling with diffusion-based detail enhancement
• build an upscaling workflow template in ComfyUI

When to choose

• you already use ComfyUI and want tiled diffusion upscaling nodes
• your GPU cannot process full-size large images in one pass
• you want the A1111 Ultimate Upscale behavior inside ComfyUI workflows

When to avoid

• you use Automatic1111 Web UI instead of ComfyUI (use the original extension)
• you only need simple interpolation upscaling without diffusion
• you do not run ComfyUI at all

Facets

plugin · maturity active

image-processing stable-diffusion plugin-system image-processing artificial-intelligence graphics python cross-platform comfyui comfyui-custom-nodes upscaling tiled-diffusion stable-diffusion image-upscale gpu

Member repositories

For agents

markdown · JSON · MCP: product_card(name="ssitu/ComfyUI_UltimateSDUpscale")