Is None(isNone)

Description

The Is None node checks whether a value connected to its any input is None. It is a simple logic utility: if the incoming value is None (null / nothing), it outputs True; otherwise it outputs False.

It belongs to the EasyUse/Logic category and is useful for data-flow branching, enabling or disabling parts of a workflow based on whether an optional value was provided.

Inputs

• any (ANYTYPE, required): A value of any type. The node accepts any ComfyUI data type – models, latents, conditioning, images, strings, numbers, or custom objects – and tests whether that value is None.

Outputs

• BOOLEAN: A boolean value. True if the input is None; False if the input is any other value.

Usage Notes

• Use this node to detect missing upstream data, e.g. an optional model, conditioning, or image that was not provided.
• It can be combined with boolean routing or switch logic in a workflow to handle missing inputs gracefully.
• Because the input accepts ANYTYPE, there is no need to convert or format the value before connecting it.
• The output is a standard ComfyUI boolean, so it can be passed to other nodes that expect a BOOLEAN input.