ComfyUI-vslinx-nodes

A set of custom nodes for ComfyUI that make workflows easier: load multiple images via a multi-select dialog with preview. The images are instantly uploaded to the input folder and can be output either as a list or a batch. It also includes boolean AND and OR operators as well as a boolean flip for easy workflow branching, along with nodes to bypass or mute other nodes based on a boolean value. Includes a Fit Image into BBox Mask node as well, that precisely fits and places an image into a masked region’s bounding box — ideal for compositing poses, objects, or partial elements into existing images with preserved aspect ratio and alignment options. Furthermore includes a bridge to connect a rgthree power lora loader to the image saver to persist lora information in metadata.

How to Install

Recommended

• Install via ComfyUI-Manager.

Manual

• Navigate to ComfyUI/custom_nodes in your terminal (cmd).
• Clone the repository under the custom_nodes directory using the following command:

  git clone https://github.com/vslinx/ComfyUI-vslinx-nodes.git comfyui-vslinx-nodes
  

Nodes

Image

Load (Multiple) Images (List)

Provides a simple node with a “Select Images” button that lets you choose one or multiple images. After selection, the images are uploaded to your input folder in ComfyUI (the same behavior as the default Load Image node). The node also includes a preview of the selected images: you can click on an image to switch from the tile view to a full image view. Clicking the X returns you to the tile view, while the numbering in the bottom-right corner allows you to switch between images.
The node includes a max_images property that defines how many images can be loaded. If set to 0 or left empty, the number of allowed images is unlimited.
It also includes a fail_if_empty property to throw an error if no elements are being passed, likely caused by images having been deleted or moved from the input folder. The images are returned as an image list, allowing downstream nodes to process them one after another.

Load (Multiple) Images (Batch)

This node works the same way as the Load (Multiple) Images (List)-Node but the images are returned as a batch, allowing downstream nodes to process them together.

Boolean

Boolean AND Operator

Provides a node with 2 boolean inputs. Outputs True only if both inputs are True. Otherwise returns False.

Boolean OR Operator

Just like the AND Operator it provides a node with 2 boolean inputs. Outputs True if either input is True. Returns False only if both are False.

Boolean Flip

Flips the input value: True → False, False → True. Useful for inverting conditions.

Utility

Forward/Bypass on Boolean (Any)

This node accepts any input type and forwards it unchanged. Its pass-through behavior can be controlled with the built-in boolean switch or by linking an external boolean node. This allows you to create conditional branches in your workflow. The bypass state is applied instantly in the UI, without waiting for workflow execution.

Forward/Mute on Boolean (Any)

This node works the same way as Forward/Bypass on Boolean (Any), but instead of bypassing the connected nodes it mutes them. The mute state can be controlled with the built-in boolean switch or by linking an external boolean, and changes are applied instantly in the UI.

Power Lora Loader to Prompt (Image Saver)

This node acts as a bridge between the Power Lora Loader (rgthree) node by rgthree and the Image Saver node by alexopus.
You can either connect a model, or provide the id or title of a Power Lora Loader (rgthree) node, along with your prompt as a text string. The node will then append the LoRAs in the correct format for the Image Saver node. When you pass this new string to Image Saver as the positive prompt, it will save the hashes of the LoRAs for Civitai and other AI platforms while removing the LoRAs from the final string, so your prompt doesn’t look messy.

Inpaint helper

Fit Image into BBox Mask

This node fits an image inside the bounding box region of a mask and places it into a destination image (or a blank canvas). It’s useful for workflows where you want to insert or align a smaller image (e.g. pose, object, logo, patch) into a specific masked region while keeping correct proportions. This node does the following:

• Detects the bounding box (BBox) of your input mask — that is, the smallest rectangle that covers all white/non-zero pixels.
• Resizes the source image to fit inside (or cover) that bounding box, preserving aspect ratio.
• Places the resized image at the corresponding position in the destination image.
• Outputs the final composited image, a stand-alone fitted image, and a mask showing the exact placed region.

You can find an example workflow here for the images generated in the gif below(download and drop the workflow image into comfyui).

Changelog

v1.3.0

• added new Power Lora Loader to Prompt (Image Saver)-Node to the utility group. This Node can read the loras of a Power Lora Loader from rgthree and append them to a text string - this is helpful in combination with the Image Saver Node from alexopus to persist loras & their weights.

v1.2.0

• added documentation including input & output parameters for every single node, viewable via the in-comfy node info view
• changed some of the texts in readme & removed parameter documentation from readme
• changed folder structure to include docs alongside js

v1.1.3

• added new Fit Image into BBox Mask-Node in it's own vsLinx/inpaint node-library. This node fits an image inside the bounding box region of a mask and places it into a destination image (or a blank canvas). It’s useful for workflows where you want to insert or align a smaller image (e.g. pose, object, logo, patch) into a specific masked region while keeping correct proportions. It's intended to be used in an inpainting process where you'll pre-process this image and execute a controlnet on the masked area. An example and can be found in the node description above.

v1.1.2

• The Forward/Bypass on Boolean (Any) and Forward/Mute on Boolean (Any) now search for the parent boolean value(s) of the upstream nodes if they're either Boolean AND Operator, Boolean OR Operator or Boolean flip to ensure bypassing even if boolean value is passed by a node instead of the in-node switch.

v1.1.1

• added Forward/Bypass on Boolean (Any) that lets you bypass directly connected node(s) based on a boolean value
• added Forward/Mute on Boolean (Any) that lets you mute directly connected node(s) based on a boolean value
• added Boolean AND Operator that returns true if both of it's boolean inputs are true, otherwise returns false
• added Boolean OR Operator that returns true if either of it's boolean inputs are true, otherwise returns false
• added Boolean flip that flips a boolean value: True becomes False, False becomes True.
• added descriptions for the Load (Multiple) Images (List/Batch)-Nodes

v1.0.1

• added fail_if_empty property in Properties (default true) to stop graph when selection resolves to no images
• improved runtime errors when files are missing from input (clear “No valid images found…” message)
• check for removed/missing files against server (HEAD/GET) after load/upload and before preview
• preview no longer prunes on browser decode failure; it’s best-effort and non-blocking
• de-duplicate selections (order-preserving) and respect max_images cap
• auto-prune missing files from selected_paths after restarts or external deletions
• renamed nodes (display names only; IDs unchanged for backward compatibility)

v1.0.0

• initial release