ComfyUI Model Batch Downloader

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This custom node downloads multiple ComfyUI model files from Hugging Face, Civitai, and arbitrary HTTP/HTTPS URLs with aria2c, then loads supported files within the same ComfyUI queue. Its thirteen destination categories are checkpoints, diffusion_models, text_encoders, vae, loras, controlnet, embeddings, upscale_models, onnx, sam3, llm, ultralytics_bbox, and ultralytics_segm.

Existing files are not overwritten, and checksums are not verified. Incomplete files with an .aria2 sidecar are resumed.

Requirements

• ComfyUI
• Python 3.10 or later
• The aria2c command, available on the PATH of the environment that starts ComfyUI

aria2c is not bundled with this repository and is not installed automatically.

Installation

Run this from the ComfyUI directory.

git clone https://github.com/watarika/ComfyUI-Model-Batch-Downloader.git custom_nodes/ComfyUI-Model-Batch-Downloader

Then restart ComfyUI. No additional Python packages are required.

Authentication

Do not enter tokens in nodes or workflow JSON. Set them as environment variables for the process that starts ComfyUI.

Service	Environment variable
Hugging Face	HF_TOKEN
Civitai	CIVITAI_API_TOKEN

PowerShell example:

$env:HF_TOKEN = "hf_..."
$env:CIVITAI_API_TOKEN = "..."
python main.py

Linux example:

export HF_TOKEN='hf_...'
export CIVITAI_API_TOKEN='...'
python main.py

Tokens are sent only to the corresponding domains and are not stored in the manifest, DOWNLOAD_RESULT, or UI state.

For Civitai download URLs, civitai.red is recommended. Use https://civitai.red/api/download/models/{modelVersionId}. civitai.com download URLs are deprecated for this custom node and may fail with HTTP 403, especially for restricted or NSFW files.

Nodes

• Model Download Batch: A list UI with add and remove buttons. It stores canonical JSON internally.
• Model Download Batch (JSON): A direct JSON-input version using the same core.
• Load Checkpoint (Downloaded): Loads models from the checkpoints category using ComfyUI's standard checkpoint loader behavior.
• Load Diffusion Model (Downloaded): Loads models from the diffusion_models category using ComfyUI's standard diffusion-model loader behavior.
• Load CLIP (Downloaded): Uses the same type choices as ComfyUI's standard Load CLIP, including krea2, ideogram4, and flux2.
• Load VAE (Downloaded): Loads models from the vae category using ComfyUI's standard VAE loader behavior.
• Load ControlNet (Downloaded): Loads models from the controlnet category using ComfyUI's standard ControlNet loader behavior.
• Load Upscale Model (Downloaded): Loads models from the upscale_models category using ComfyUI's standard upscale-model loader behavior.
• Load LoRA (Downloaded): Loads models from the loras category using ComfyUI's standard LoRA loader behavior. For model-only LoRAs, strength_clip can be set to 0.

Both download nodes have an arbitrary-type passthrough input and output. They can be inserted into an existing connection or run unconnected as output nodes. To use downloaded results, connect download_result to the corresponding Downloaded Loader and specify the manifest id.

Usage examples

The following model families illustrate common setups; they are examples, not an exhaustive compatibility list.

• Illustrious: Download an all-in-one checkpoint to checkpoints, then load it with Load Checkpoint (Downloaded).
• Anima: Download a separate diffusion model, text encoder, and VAE to diffusion_models, text_encoders, and vae, then load each one with its corresponding Downloaded Loader.
• Krea 2: Download a separate diffusion model and VAE to diffusion_models and vae. Download its text encoder to text_encoders, then select krea2 in Load CLIP (Downloaded).

Download progress

While a download node is running, it displays ComfyUI's standard progress bar, the same one used by KSampler. With multiple files, the bar does not reset; it advances from 0 to 100% across the entire batch.

Approximately once per second, the ComfyUI log shows the current ID, percentage, speed, and ETA.

[Model Batch Downloader] anima_model 42%  18.3MiB  ETA 31s

Authentication tokens and authenticated URLs are never written to the log.

Manifest

The root is a JSON array containing at least one item. Each item supports these fields:

Field	Required	Description
url	Yes	HTTP/HTTPS URL
model_type	Yes	One of the thirteen categories in the compatibility table below
subfolder	No	Destination under the corresponding ComfyUI model root
filename	No	If omitted, resolved from the response or URL
id	No	If omitted, the filename without its final extension
split	No	1–16; default 16

Without subfolder, each category uses the following directory. A configured ComfyUI folder path for the category takes precedence over this default.

model_type	Default directory	Companion loader / consumer
checkpoints	models/checkpoints	Load Checkpoint (Downloaded)
diffusion_models	models/diffusion_models	Load Diffusion Model (Downloaded)
text_encoders	models/text_encoders	Load CLIP (Downloaded)
vae	models/vae	Load VAE (Downloaded)
loras	models/loras	Load LoRA (Downloaded)
controlnet	models/controlnet	Load ControlNet (Downloaded)
embeddings	models/embeddings	ComfyUI prompt references; no companion loader
upscale_models	models/upscale_models	Load Upscale Model (Downloaded)
onnx	models/onnx	Impact Pack
sam3	models/sam3	comfyui-sam3 path-based (down)Load SAM3 Model; default models/sam3/sam3.pt
llm	models/llm	ComfyUI_LLM_SDXL_Adapter: LLM Model Loader / LLM GGUF Model Loader; no companion loader
ultralytics_bbox	models/ultralytics/bbox	Impact Subpack
ultralytics_segm	models/ultralytics/segm	Impact Subpack

Embedding files are used through prompt references and have no companion loader. comfyui-sam3 consumes a path string through its path-based (down)Load SAM3 Model; its default models/sam3/sam3.pt points to this downloader's default SAM3 destination, but this downloader does not provide a SAM3 companion loader. For LLM files, ComfyUI_LLM_SDXL_Adapter reads models/llm through LLM Model Loader and LLM GGUF Model Loader. LLM support covers single-file downloads only; it does not automatically provide repository snapshots or multi-file inference. Impact Pack, comfyui-sam3, ComfyUI_LLM_SDXL_Adapter, Impact Subpack, and other optional custom nodes are not dependencies of this downloader; install and use them separately when you need their consumer nodes.

A Civitai LoRA example using the recommended domain:

[
  {
    "url": "https://civitai.red/api/download/models/{modelVersionId}",
    "model_type": "loras",
    "id": "civitai_lora",
    "filename": "civitai_lora.safetensors"
  }
]

A concrete usage example for Anima:

[
  {
    "url": "https://huggingface.co/owner/repo/resolve/main/anima-model.safetensors",
    "model_type": "diffusion_models",
    "subfolder": "anima",
    "id": "anima_model",
    "split": 16
  },
  {
    "url": "https://huggingface.co/owner/repo/resolve/main/qwen3-0.6b.safetensors",
    "model_type": "text_encoders",
    "subfolder": "anima",
    "id": "anima_encoder"
  },
  {
    "url": "https://huggingface.co/owner/repo/resolve/main/qwen-image-vae.safetensors",
    "model_type": "vae",
    "id": "qwen_vae"
  }
]

Connect download_result to the three corresponding loaders and specify anima_model, anima_encoder, and qwen_vae, respectively.

If a URL resolves to model.fp16.safetensors and id is omitted, the ID is model.fp16. For sources such as the Civitai API where the filename cannot be determined from the URL suffix, use Resolve filename / ID in the list UI to resolve it in advance. An explicit id is recommended for stable references in the JSON version.

Existing files and errors

• If a completed file exists, it is marked skipped without starting aria2.
• If <filename>.aria2 exists, the download resumes in aria2 continuation mode.
• Multiple items are processed in order. If one fails, the remaining items are still attempted, and failures are reported together at the end.
• Destinations are restricted to the configured ComfyUI model roots.
• Duplicate IDs or destinations within a manifest are errors.

Troubleshooting

• aria2c is required: Confirm that aria2c --version works in the same environment as ComfyUI, then restart ComfyUI.
• Hugging Face 401/403: Check HF_TOKEN and your repository access permissions.
• Civitai 401/403: Use the recommended civitai.red download URL and check CIVITAI_API_TOKEN. A civitai.com URL may fail even when the token is valid.
• duplicate id: Assign a unique explicit id to one of the entries.
• category mismatch: Connect to the Downloaded Loader corresponding to the ID's model_type.
• No loader for an extended category: Use the consumer shown in the compatibility table. External consumer plugins are independently installed and maintained; this downloader only owns downloading the file to the selected destination.