ComfyUI Simple Variables

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

Installation

cd ComfyUI/custom_nodes
git clone https://github.com/jessesep/ComfyUI-SimpleVariables.git

Restart ComfyUI and search for "variable" in the node menu.

Nodes

Node	Description	Category
Set Variable	Store any data with a custom name	variables
Get Variable	Retrieve stored data by name	variables
List Variables	Show all stored variables	variables

Usage

Basic Example

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

... elsewhere in workflow ...

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

How It Works

1. Set Variable stores any input data with your chosen variable name
2. Data passes through, so you can continue your workflow normally
3. Get Variable retrieves stored data anywhere by name
4. Works with ALL ComfyUI data types: Image, Mask, Latent, Model, CLIP, VAE, Conditioning, String, Int, Float, and custom types

Tips

• Use descriptive names like "upscaled_image" or "final_mask"
• List Variables helps debug what's currently stored
• Variables persist for the ComfyUI session (cleared on restart)
• If a variable doesn't exist, you'll see available variable names in the error

Why Use This?

• Reduce wire clutter - "Wireless" data transfer across your workflow
• Reuse outputs - Store once, use multiple times
• Simplify complex workflows - No more spaghetti connections
• Universal - One node handles all data types

Deprecated Nodes

Type-specific nodes (Set Image Variable, Set Mask Variable, etc.) are available under variables/deprecated for backward compatibility, but Set/Get Variable handles all types so they're no longer needed.

License

MIT License - Free to use and modify.

Credits

Created by jessesep with assistance from Claude (Anthropic).