> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# InvertMask - ComfyUI Built-in Node Documentation

> Complete documentation for the InvertMask node in ComfyUI. Learn its inputs, outputs, parameters and usage.

The InvertMask node is designed to invert the values of a given mask, effectively flipping the masked and unmasked areas. This operation is fundamental in image processing tasks where the focus of interest needs to be switched between the foreground and the background.

## Inputs

| Parameter | Data Type | Description                                                                                                                                    |
| --------- | --------- | ---------------------------------------------------------------------------------------------------------------------------------------------- |
| `mask`    | MASK      | The 'mask' parameter represents the input mask to be inverted. It is crucial for determining the areas to be flipped in the inversion process. |

## Outputs

| Parameter | Data Type | Description                                                                                                         |
| --------- | --------- | ------------------------------------------------------------------------------------------------------------------- |
| `mask`    | MASK      | The output is an inverted version of the input mask, with previously masked areas becoming unmasked and vice versa. |