# ComfyUI Content Viewer ![ComfyUI](https://img.shields.io/badge/ComfyUI-Custom_Node-blue) ![Frontend Extension](https://img.shields.io/badge/ComfyUI_Frontend-Extension-purple) ![License](https://img.shields.io/badge/License-MIT-green) A powerful, extensible ComfyUI custom node with a modular **Views Extension System** that renders content in a secure embedded iframe viewer. Views are dynamically loaded and can be added, removed, or modified without touching core code. ![Screenshot 9](screenshots/screenshot_14.jpg) ## Table of Contents - [Screenshots](#screenshots) - [Features](#features) - [Third-Party Views](#third-party-views) - [Built-in Views](#built-in-views) - [Installation](#installation) - [Usage](#usage) - [Creating Extensions](#creating-extensions) - [Troubleshooting](#troubleshooting) - [Third-Party Licenses](#third-party-licenses) - [License](#license) # Screenshots

Screenshots

![Screenshot 1](screenshots/screenshot_1.jpg) ![Screenshot 2](screenshots/screenshot_2.gif) ![Screenshot 3](screenshots/screenshot_3.jpg) ![Screenshot 4](screenshots/screenshot_4.jpg) ![Screenshot 5](screenshots/screenshot_5.jpg) ![Screenshot 6](screenshots/screenshot_6.jpg) ![Screenshot 7](screenshots/screenshot_7.jpg) ![Screenshot 8](screenshots/screenshot_8.jpg) ![Screenshot 9](screenshots/screenshot_9.jpg) ![Screenshot 6](screenshots/screenshot_10.jpg) ![Screenshot 7](screenshots/screenshot_11.jpg) ![Screenshot 8](screenshots/screenshot_12.jpg) ![Screenshot 9](screenshots/screenshot_13.jpg) ![Screenshot 9](screenshots/screenshot_14.jpg)

## Features ### Views Extension System - **Modular architecture** - Each content type is handled by its own view extension - **Dynamic loading** - Views are auto-discovered from `web/views/view_manifest.js` - **Priority-based detection** - Higher priority views are checked first for content matching - **Extensible** - Add custom views without modifying core viewer code - **Theme integration** - All views receive ComfyUI theme tokens for consistent styling ### Multi-View Support - **Automatic detection** - When multiple views can handle the same content, a view selector appears - **View switching** - Toggle between different visualizations of the same data (e.g., tensor as Canvas vs Object inspector) - **Priority-based default** - The highest priority matching view is shown by default - **Common use case** - IMAGE tensors are detected by both Canvas (for compositing) and Object (for metrics/inspection) views ### Controls - **Edit** - Modify content directly in the node (supports both single and list content) - **Clear** - Reset all content - **Fullscreen** - Expand viewer to full screen (press Escape to exit) - **Download** - Save content with auto-detected file extension - Single content → Downloads with appropriate extension (`.html`, `.svg`, `.md`, `.py`, etc.) - List content → Downloads as `.zip` containing individually named files ### String List Support - **Multiple items** - Displays list inputs as individual indexed containers - **Per-item checkboxes** - Filter which items to include in output - **Per-item copy buttons** - Copy individual list items to clipboard - **Per-item editing** - Edit each list item in its own textarea ### Data Flow - **Flexible input** - Accepts any type via `content` input (STRING, lists, objects, IMAGE tensors) - **Content priority** - User edits > Backend execution > Connected content - **Workflow persistence** - Manual edits saved with the workflow ### Security - **Sandboxed iframe** - Content runs in isolated sandbox without access to parent page - **No same-origin** - Iframe cannot access ComfyUI's JavaScript context or localStorage --- ## Third-Party Views | View Name | View Description | View Link | |-----------|------------------|-----------| | **Image Search** | Search input/output/temp directories for images by input image | [Image Search](https://github.com/WASasquatch/ComfyUI_Viewer_Image_Search_Extension) | | **OpenReel Video** | Edit videos generated within ComfyUI (e.g., from Wan, LTX,, etc.) | [OpenReel Video](https://github.com/WASasquatch/ComfyUI_Viewer_OpenReel_Extension) | ## Built-in Views The Content Viewer includes 12 built-in views, listed by detection priority: | View | Priority | Detection | Description | |------|----------|-----------|-------------| | **SVG** | 110 | `

Canvas View - Infinite canvas image compositor

The Canvas view provides a full-featured image compositing workspace: - **Layer management** - Add, reorder, hide/show, delete layers - **Transform tools** - Move, scale, rotate layers with handles - **Brush tools** - Paint, erase, clone stamp with adjustable size/hardness/opacity - **Layer effects** - Opacity, blend modes (16 modes), stroke, shadow - **Layer masks** - Non-destructive masking with brush tools - **Export** - Download PNG or send composite to node output as IMAGE tensor - **Navigator** - Mini-map for large canvas navigation - **Keyboard shortcuts** - V (select), H (pan), B (brush), Delete, Ctrl+Z/Y The Canvas view outputs `IMAGE` and `MASK` tensors that can be connected to other ComfyUI nodes.

Markdown View - Rich text with diagrams and math

Supports full Markdown syntax plus: - **Mermaid diagrams** - Flowcharts, sequence diagrams, etc. in ` ```mermaid ` blocks - **KaTeX math** - LaTeX formulas via `$$...$$` (block) or `$...$` (inline) - **Tables** - Styled with zebra striping - **Code blocks** - Syntax highlighted with Prism.js - **Task lists** - Checkbox items `- [x]` and `- [ ]`

JSON View - Interactive tree viewer

- **Collapsible nodes** - Click to expand/collapse objects and arrays - **Syntax highlighting** - Keys, strings, numbers, booleans, null - **Copy on click** - Click any value to copy it - **Nested formatting** - Proper indentation for deep structures

Terminal View - ANSI escape code parser

Renders terminal output with full ANSI support: - **16 colors** - Standard terminal colors - **256 colors** - Extended color palette - **24-bit colors** - True color RGB - **Styles** - Bold, italic, underline, strikethrough - **Reset codes** - Proper handling of reset sequences

--- ## Installation **Option A (git clone)** ```bash cd ComfyUI/custom_nodes git clone https://github.com/WASasquatch/ComfyUI_Viewer.git ``` **Option B (ComfyUI Manager)** - Open Manager and search for **ComfyUI_Viewer** **Option C (zip)** - Download and extract to `ComfyUI/custom_nodes/ComfyUI_Viewer` --- ## Usage ### Basic Usage 1. Add the **Content Viewer** node (found in `WAS/View` category) 2. Connect any STRING output to the `content` input 3. Content type is auto-detected and rendered with the appropriate view ### As a Notes/Documentation Node 1. Add the **Content Viewer** node 2. Click **Edit** in the controls bar 3. Enter your HTML, Markdown, or text content 4. Click **Save** to render ### Using the Canvas Compositor 1. Connect IMAGE outputs to the Canvas Composer node 2. Images appear in the source panel - drag them onto the canvas 3. Use transform handles to position and scale 4. Use brush tools to paint or mask 5. Click **Send to Output** to pass the composite downstream --- ## Creating Extensions The Content Viewer supports custom view extensions for adding new content types, interactive UIs, and visualizations. **📖 See the [Extension Development Guide](extensions/README.md) for complete documentation on:** - Creating extension packages for distribution - Adding frontend views (JavaScript) - Adding backend parsers (Python) - Parser + View integration - Troubleshooting **Quick install for users:** 1. Download an extension `.zip` file 2. Place it in `ComfyUI_Viewer/extensions/` 3. Restart ComfyUI --- ## Troubleshooting ### Content not updating - Ensure the connected node is executing (queue the workflow) - Try disconnecting and reconnecting the input ### View not detecting content - Check the browser console (F12) for `[WAS Viewer]` messages - Verify your view's `detect()` returns a score > 0 for your content - Check priority - higher priority views are tested first ### Canvas images not loading - Ensure images are in ComfyUI's input directory. - Search for a folder that looks like `was_viewer_032bb95c` where the last part is a unique hash for that nodes canvas content. - Check for CORS errors in browser console ### Custom view not appearing - Verify the file is listed in `view_manifest.js` - Check for JavaScript errors in browser console - Ensure `export default YourViewClass` is present --- ## Third-Party Licenses This project includes the following third-party libraries: | Library | License | Description | Location | |---------|---------|-------------|----------| | [Prism.js](https://prismjs.com/) | MIT | Syntax highlighting for code blocks | `web/views/code_scripts/` | | [KaTeX](https://katex.org/) | MIT | LaTeX math rendering | `web/views/markdown_scripts/` | | [Mermaid](https://mermaid.js.org/) | MIT | Diagram and flowchart rendering | `web/views/markdown_scripts/` | | [KaTeX Fonts](https://katex.org/) | SIL OFL 1.1 | Math fonts for KaTeX | `fonts/` | Full license texts are included with each library in their respective directories. --- ## License MIT License - See [LICENSE](LICENSE) for details

Name	Type	Default	Description
images_aopt	IMAGE		—
images_bopt	IMAGE		—

CV Canvas Compose Batch

Inputs (2)

Outputs (1)