Save Image KJ (SaveImageKJ) - ComfyUI-KJNodes

The Save Image KJ node, based on ComfyUI's folder path management system, can convert input image tensors into common image formats (such as PNG) and write them to a specified directory.

The Save Image KJ node is an output node in ComfyUI used for saving images. Its core function is to save image data generated in the workflow to the local disk and supports appending descriptive text to the saved files.

Node Functionality

This node is based on ComfyUI's folder path management system and can convert input image tensors into common image formats (such as PNG) and write them to a specified directory. It supports using dynamic format strings in filenames, such as referencing attribute values from other nodes or the current date, to achieve flexible file naming. Additionally, the node provides an optional text input interface, allowing users to generate a separate text description file for the saved image.

Node Parameter Description - Save Image KJ

Connection Inputs (Inputs)

Parameter Name	Data Type	Required	Default Value	Range/Options	Description
`images`	IMAGE	Yes	-	-	The images to save.

Control Parameters (Parameters)

Parameter Name	Data Type	Required	Default Value	Range/Options	Description
`filename_prefix`	STRING	Yes	ComfyUI	-	The prefix for the file to save. This may include formatting information such as %date:yyyy-MM-dd% or %Empty Latent Image.width% to include values from nodes.
`output_folder`	STRING	Yes	output	-	The folder to save the images to.
`caption_file_extension`	STRING	No	.txt	-	The extension for the caption file.
`caption`	STRING	No	-	-	string to save as .txt file

Output

Parameter Name	Data Type	Description
filename	STRING	Defines the prefix for the saved filename, supporting strings that include dynamic formatting.

Usage Scenarios

In a typical image generation workflow, you can connect the final image output from nodes such as KSampler or VAE Decode to the "images" input port of this node. Then, configure the output folder and filename prefix, and the node will automatically save the rendered results. If you need to record prompts or metadata for each generated image, you can connect these text information to the "caption" input port, and the node will save them as a text file with the same name.

Notes

Please note that the output_folder parameter can accept relative or absolute paths. When using a relative path, it will be resolved based on the output directory configured in ComfyUI. Ensure that the process running ComfyUI has write permissions to the target folder; otherwise, the save operation will fail.

Save Image KJ Node Source Code Link

The Save Image KJ node is from the ComfyUI-KJNodes node package.

Save Image KJ(SaveImageKJ)

Save Image KJ