ComfyUI lets you design and execute advanced stable diffusion pipelines using a graph/nodes/flowchart based interface. Available on Windows, Linux, and macOS.

I. Features

Nodes/graph/flowchart interface to experiment and create complex Stable Diffusion workflows without needing to code anything.
Image Models
- SD1.x, SD2.x (unCLIP)
- SDXL, SDXL Turbo
- Stable Cascade
- SD3 and SD3.5
- Pixart Alpha and Sigma
- AuraFlow
- HunyuanDiT
- Flux
- Lumina Image 2.0
- HiDream
- Cosmos Predict2
- Qwen Image
Image Editing Models
- Omnigen 2
- Flux Kontext
- HiDream E1.1
Video Models
- Stable Video Diffusion
- Mochi
- LTX-Video
- Hunyuan Video
- Nvidia Cosmos and Cosmos Predict2
- Wan 2.1
- Wan 2.2
Audio Models
- Stable Audio
- ACE Step
3D Models
- Hunyuan3D 2.0
Asynchronous Queue system
Many optimizations: Only re-executes the parts of the workflow that changes between executions.
Smart memory management: can automatically run large models on GPUs with as low as 1GB vram with smart offloading.
Works even if you don't have a GPU with: --cpu (slow)
Can load ckpt and safetensors: All in one checkpoints or standalone diffusion models, VAEs and CLIP models.
Safe loading of ckpt, pt, pth, etc.. files.
Embeddings/Textual inversion
Loras (regular, locon and loha)
Hypernetworks
Loading full workflows (with seeds) from generated PNG, WebP and FLAC files.
Saving/Loading workflows as Json files.
Nodes interface can be used to create complex workflows like one for Hires fix or much more advanced ones.
Area Composition
Inpainting with both regular and inpainting models.
ControlNet and T2I-Adapter
Upscale Models (ESRGAN, ESRGAN variants, SwinIR, Swin2SR, etc...)
GLIGEN
Model Merging
LCM models and Loras
Latent previews with TAESD
Works fully offline: core will never download anything unless you want to.
Optional API nodes to use paid models from external providers through the online Comfy API.
Config file to set the search paths for models.

Workflow examples can be found on the Examples page

II. Shortcuts

Keybind	Explanation
`Ctrl` + `Enter`	Queue up current graph for generation
`Ctrl` + `Shift` + `Enter`	Queue up current graph as first for generation
`Ctrl` + `Alt` + `Enter`	Cancel current generation
`Ctrl` + `Z`/`Ctrl` + `Y`	Undo/Redo
`Ctrl` + `S`	Save workflow
`Ctrl` + `O`	Load workflow
`Ctrl` + `A`	Select all nodes
`Alt` + `C`	Collapse/uncollapse selected nodes
`Ctrl` + `M`	Mute/unmute selected nodes
`Ctrl` + `B`	Bypass selected nodes (acts like the node was removed from the graph and the wires reconnected through)
`Delete`/`Backspace`	Delete selected nodes
`Ctrl` + `Backspace`	Delete the current graph
`Space`	Move the canvas around when held and moving the cursor
`Ctrl`/`Shift` + `Click`	Add clicked node to selection
`Ctrl` + `C`/`Ctrl` + `V`	Copy and paste selected nodes (without maintaining connections to outputs of unselected nodes)
`Ctrl` + `C`/`Ctrl` + `Shift` + `V`	Copy and paste selected nodes (maintaining connections from outputs of unselected nodes to inputs of pasted nodes)
`Shift` + `Drag`	Move multiple selected nodes at the same time
`Ctrl` + `D`	Load default graph
`Alt` + `+`	Canvas Zoom in
`Alt` + `-`	Canvas Zoom out
`Ctrl` + `Shift` + LMB + Vertical drag	Canvas Zoom in/out
`P`	Pin/Unpin selected nodes
`Ctrl` + `G`	Group selected nodes
`Q`	Toggle visibility of the queue
`H`	Toggle visibility of history
`R`	Refresh graph
`F`	Show/Hide menu
`.`	Fit view to selection (Whole graph when nothing is selected)
Double-Click LMB	Open node quick search palette
`Shift` + Drag	Move multiple wires at once
`Ctrl` + `Alt` + LMB	Disconnect all wires from clicked slot

Ctrl can also be replaced with Cmd instead for macOS users

III. Manual Install on Windows

NOTE: Python 3.12 is used in this repository.

Git clone this repo.

git clone https://github.com/rzasharp79/4090_ComfyUI

Put your SD checkpoints (the huge ckpt/safetensors files) in: models/checkpoints
Put your VAE in: models/vae
Run STEP1-INSTALL.bat
Run STEP2-INSTALL_CUSTOM_NODES.bat
Run START_COMFY.bat

IV. Notes

Only parts of the graph that have an output with all the correct inputs will be executed.
Only parts of the graph that change from each execution to the next will be executed, if you submit the same graph twice only the first will be executed. If you change the last part of the graph only the part you changed and the part that depends on it will be executed.
Dragging a generated png on the webpage or loading one will give you the full workflow including seeds that were used to create it.
You can use () to change emphasis of a word or phrase like: (good code:1.2) or (bad code:0.8). The default emphasis for () is 1.1. To use () characters in your actual prompt escape them like \( or \).
You can use {day|night}, for wildcard/dynamic prompts. With this syntax "{wild|card|test}" will be randomly replaced by either "wild", "card" or "test" by the frontend every time you queue the prompt. To use {} characters in your actual prompt escape them like: \{ or \}.
Dynamic prompts also support C-style comments, like // comment or /* comment */.
To use a textual inversion concepts/embeddings in a text prompt put them in the models/embeddings directory and use them in the CLIPTextEncode node like this (you can omit the .pt extension):

embedding:embedding_filename.pt

How to show high-quality previews?

Use --preview-method auto to enable previews.

The default installation includes a fast latent preview method that's low-resolution. To enable higher-quality previews with TAESD, download the taesd_decoder.pth, taesdxl_decoder.pth, taesd3_decoder.pth and taef1_decoder.pth and place them in the models/vae_approx folder. Once they're installed, restart ComfyUI and launch it with --preview-method taesd to enable high-quality previews.

How to use TLS/SSL?

Generate a self-signed certificate (not appropriate for shared/production use) and key by running the command: openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -sha256 -days 3650 -nodes -subj "/C=XX/ST=StateName/L=CityName/O=CompanyName/OU=CompanySectionName/CN=CommonNameOrHostname"
Use --tls-keyfile key.pem --tls-certfile cert.pem to enable TLS/SSL, the app will now be accessible with https://... instead of http://....

Note: Windows users can use alexisrolland/docker-openssl or one of the 3rd party binary distributions to run the command example above.

If you use a container, note that the volume mount -v can be a relative path so ... -v ".\:/openssl-certs" ... would create the key & cert files in the current directory of your command prompt or powershell terminal.

V. Support and dev channel

Discord: Try the #help or #feedback channels.

Matrix space: #comfyui_space:matrix.org (it's like discord but open source).

VI. Changelog

Rev 0.1.1a (2025-08-23):

- Changed the names of batch files for running and installing
- Updated to latest Comfy version

Rev 0.0.1a (2025-08-23):

First commit to test out README markdown.