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Document Preview to Load Image node in README

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Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Ethanfel
2026-02-24 12:29:09 +01:00
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<img src="https://img.shields.io/badge/ComfyUI-Custom%20Node-purple" alt="ComfyUI" />
</p>
A single ComfyUI node that reads any JSON file and **automatically creates output slots** for every key it finds. No hardcoded outputs &mdash; when your JSON structure changes, just click Refresh.
A collection of ComfyUI utility nodes: a **dynamic JSON loader** that auto-creates outputs from any JSON file, **string/path helpers**, and a **preview-to-LoadImage bridge** that lets you push generated images (with optional masks) into LoadImage nodes.
## Features
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When a connected input (`on_true`/`on_false`) is present it takes priority; otherwise the corresponding `default_*` string widget is used.
## Image Utility Nodes
### Preview to Load Image (`utils/image`)
Previews an image like the built-in PreviewImage node, but also saves a copy to ComfyUI's `input/` folder so you can push it into any **LoadImage** node with one click.
| Input | Type | Notes |
|:---|:---|:---|
| `images` | IMAGE | Required |
| `filename` | STRING | Name for the saved file (without extension, default `preview`) |
| `mask` | MASK | Optional &mdash; embedded as the PNG alpha channel |
**Widgets (JS-side):**
| Widget | Description |
|:---|:---|
| `load_image_node_id` | ID of the target LoadImage node |
| **Send to Load Image** | Button &mdash; sets the target node's image selector to the saved file |
**How it works:**
1. On execution, the node saves a temp preview (displayed in the node) and a permanent copy to `input/{filename}.png`
2. If a **mask** is connected, it is embedded as the PNG's alpha channel &mdash; LoadImage will automatically output it as its mask
3. Enter the target LoadImage node's ID and click **Send to Load Image** &mdash; the target's image dropdown updates immediately, no restart needed
## License
[Apache 2.0](LICENSE)