WBO

WBO is a simple, lightweight online collaborative whiteboard that lets multiple users draw together on the same board in real time. Boards are automatically persisted so sessions can be revisited later, making it suitable for ad-hoc collaboration or ongoing work.

Key Features

• Real-time multi-user drawing on a shared board
• Persistent board state stored on disk for later retrieval
• Optional JWT-based authentication with role support (editor, moderator)
• Board-specific role binding via JWT to restrict access to specific boards
• Export-friendly SVG preview endpoint for boards (renderer not fully faithful)
• Configurable server behavior via environment variables (storage path, rate limits)
• StatsD-compatible metrics emission for monitoring

Use Cases

• Remote teaching and explaining concepts live on a shared canvas
• Collaborative diagramming and brainstorming sessions
• Quick shared sketching for design discussions or entertainment

Limitations and Considerations

• SVG preview rendering may not perfectly match the live board output
• Performance and DoS resilience depend on server resources and rate-limit settings

WBO is a practical choice when you need a minimal, easy-to-deploy collaborative whiteboard with real-time updates, persistence, and optional token-based access control. Its straightforward deployment options make it well-suited for teams, classrooms, and personal servers.