ComfyUI Simple Variables

A custom node pack for ComfyUI that provides Set/Get variable nodes for storing and retrieving data by name across your workflow.

Features

• Store any ComfyUI data type with a custom variable name
• Retrieve stored variables anywhere in your workflow
• Reduces wire clutter by allowing "wireless" data transfer
• Passthrough design - Set nodes output the same data they receive

Supported Variable Types

Type	Set Node	Get Node	Category
Image	Set Image Variable	Get Image Variable	variables/image
Mask	Set Mask Variable	Get Mask Variable	variables/mask
Latent	Set Latent Variable	Get Latent Variable	variables/latent
Conditioning	Set Conditioning Variable	Get Conditioning Variable	variables/conditioning
Model	Set Model Variable	Get Model Variable	variables/model
CLIP	Set CLIP Variable	Get CLIP Variable	variables/clip
VAE	Set VAE Variable	Get VAE Variable	variables/vae
String	Set String Variable	Get String Variable	variables/primitive
Int	Set Int Variable	Get Int Variable	variables/primitive
Float	Set Float Variable	Get Float Variable	variables/primitive
Any	Set Any Variable	Get Any Variable	variables

Utility Nodes

• List All Variables - Shows all currently stored variables and their types

Installation

1. Clone this repository into your ComfyUI custom_nodes folder:

   cd ComfyUI/custom_nodes
   git clone <your-repo-url> SimpleImageVariables
   

2. Restart ComfyUI

3. Search for "variable" in the node menu

Usage

Basic Example

[Load Image] → [Set Image Variable] (name: "reference")
                       ↓
              (passes image through to next node)

... elsewhere in workflow ...

[Get Image Variable] (name: "reference") → [Use Image Node]

How It Works

1. Set nodes store the input data in memory with your chosen variable name
2. Set nodes also pass the data through, so you can continue your workflow normally
3. Get nodes retrieve the stored data by variable name
4. Variables persist for the duration of the ComfyUI session

Tips

• Use descriptive variable names like "upscaled_image" or "final_mask"
• The Set Any Variable node accepts any data type (useful for custom node outputs)
• Use List All Variables to debug and see what's currently stored
• Variables are cleared when ComfyUI restarts

Node Details

Set Nodes

• Inputs:
  • data - The data to store (type depends on node)
  • variable_name - String name for the variable
• Outputs: Same data that was input (passthrough)

Get Nodes

• Inputs:
  • variable_name - String name of the variable to retrieve
• Outputs: The stored data

Error Handling

If you try to Get a variable that hasn't been Set, you'll receive an error message listing all available variable names.

License

MIT License - Free to use and modify.

Credits

Created with assistance from Claude (Anthropic) for ComfyUI workflow optimization.