What it does
WBO is a collaborative online whiteboard that lets multiple users draw simultaneously on a large virtual board, with real-time updates. Boards are saved on the server and shared by URL; the public board is open to everyone, while private boards use a random or custom name.
Create a board and share its URL so others can draw alongside you. The project page says connected users see updates in real time and board contents are saved on the server. WBO is described as free and open source.
Access depends on board type: the public board is open to everyone and new drawings may cover older ones; private boards are accessible through their link, and anyone who knows a named board’s URL can access it. Use it for informal drawing or teaching rather than treating link privacy as a full access-control system.
Strengths
- Free and open-source collaborative whiteboard, according to the project page.
- Multiple users can draw at once with live updates.
- Boards can be shared through URLs, including private boards with random names.
Watch out for
- The public board is open to everyone and new drawings may cover older content.
- Private-board access relies on the link or board name, so link handling matters.
Best for
- Low-friction collaborative drawing, teaching, or informal visual ideation
- Users who want a free open-source board shared through a URL
Sources
- WBO — Collaborative whiteboard (Oct 25, 2026)