CanvasUI Stream Manager

A fully local stream overlay system — no cloud, no third-party dependencies. Design scenes in a desktop editor, serve them to OBS as a single browser source.

Uses Streamer.bot for real-time events (chat, emotes, scene switching). Renders everything to a single HTML5 canvas for minimal OBS memory usage.

Features

• Visual Scene Editor — Drag and drop modules, resize and position visually
• Multi-Scene Support — Different layouts for Gaming, Just Chatting, BRB, etc.
• OBS Scene Switching — Overlay layout changes when OBS switches scenes (via Streamer.bot)
• Live Preview — Simulate chat, emotes, audio visualiser, and webcam in the editor
• Built-in Web Server — Serves overlays directly to OBS, no separate setup
• Live Reload — Save in the editor, OBS updates instantly
• Media Library — Upload and manage images/videos, drag onto scenes
• Modular Architecture — Drop a folder into www/modules/ to add custom modules
• Canvas Rendering — All modules render to a single canvas for consistent output
• Per-Instance Settings — Multiple webcams, images, videos, audio visualisers per scene

Quick Start

1. Download the latest installer from Releases
2. Launch CanvasUI Stream Manager
3. In OBS, add a Browser Source with the URL shown in the editor toolbar
4. Design your scenes, hit Save — OBS updates live

Documentation

Full documentation is in the Wiki:

• Getting Started
• Editor Guide
• Configuration
• Modules
• Streamerbot Setup
• Developer Guide
• Changelog

For Developers

git clone https://github.com/barkermn01/CanvasUI.git
cd CanvasUI/editor
npm install
npm run dev

See the Developer Guide for module creation, schema system, and architecture details.

Building the Installer

cd editor
npm run build

Output: editor/dist/CanvasUI Setup x.x.x.xxx.exe

License

LGPL-3.0 — See LICENSE for details.

The core application is licensed under the GNU Lesser General Public License v3. Third-party modules that communicate through the public module API (window.Modules, editorRegister, info.json schema) are NOT considered derivative works and may use any license.