ComfyUI-PromptLoop

ComfyUI-PromptLoop

Batch processing of prompts from text files - One queue job for many images!

Features

🔄 Prompt Loop (File) - Reads prompts from .txt files
🔄 Prompt Loop (Text) - Processes multi-line text
ℹ️ Prompt Loop Info - Shows index and counter
💾 Prompt Loop Save Image - Saves images with prompt metadata

Installation

1. Copy this folder to ComfyUI/custom_nodes/
2. Restart ComfyUI
3. Nodes will appear under "promptloop" category

Usage

Basic Workflow

1. Create a prompts.txt in the input/ folder (one prompt per line)
2. Add the Prompt Loop (File) node
3. Connect the output to CLIPTextEncode
4. Use Prompt Loop Save Image instead of the standard Save Image node
5. One queue job → All prompts will be processed with metadata!

Workflow Example

Prompt Loop (File) → prompt → CLIPTextEncode → KSampler → VAEDecode
                       ↓                                      ↓
                  Prompt Loop Save Image ←────────────────────┘

Saving Images with Metadata

The Prompt Loop Save Image node automatically embeds your prompts into the PNG metadata, making them compatible with tools like A1111 and Civitai.

Inputs:

• images: The generated images (from VAEDecode)
• prompt: The positive prompt (connect from Prompt Loop node)
• filename_prefix: Custom filename prefix (default: "PromptLoop")
• negative_prompt (optional): Can be connected from another node or entered as text

Node Options

Prompt Loop (File)

• file: Select .txt file from input folder
• start_index: Skip the first X prompts (default: 0)
• max_prompts: Limit to X prompts (0 = all prompts)

Prompt Loop (Text)

• text: Multi-line text input (one prompt per line)
• start_index: Skip the first X prompts
• max_prompts: Limit to X prompts

Prompt Loop Save Image

• filename_prefix: Output filename prefix
• negative_prompt: Optional negative prompt (widget or connection)

Example

input/prompts.txt:
a beautiful sunset over mountains
a futuristic city at night
a cute cat sleeping on a pillow

→ Generates 3 images with one queue job!
→ Each image contains its prompt in the metadata!

Tips

• Use start_index and max_prompts to process specific ranges
• The negative prompt can be the same for all images (widget) or dynamic (connection)
• Metadata is A1111/Civitai compatible for easy sharing

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Created by max with Claude