Planner.day whiteboards are realtime, multi-cursor canvases in the same workspace as your tasks. Describe a block diagram or a system in writing and the board draws it as editable boxes and arrows, matched to a library of 1,285 official shapes from AWS, Azure and Kubernetes. Boards and public share links are on every plan, Free included.
A whiteboard is usually a separate subscription, which means the diagram explaining a project lives somewhere other than the project. Six months later the work is in one tool and the picture of how it fits together is in another, one version behind.
Planner.day boards sit in the workspace with everything else.
Realtime, genuinely
Several people can edit one canvas at the same time, each with a visible cursor. There is no locking, no save button and no merge step. This is the part that decides whether a whiteboard gets used in a live conversation or only after one.
Shapes
The shape library covers the usual flowchart and box-and-arrow vocabulary, and includes cloud architecture icons, so a systems diagram looks like a systems diagram rather than an approximation built from rectangles.
Can AI draw a block diagram on a whiteboard?
Yes. Type a description of the system, up to 8,000 characters, and Planner.day draws it on the whiteboard as a Mermaid diagram converted into real boxes and arrows you can drag, retype and extend. Labels that name a known service, such as S3 or Lambda, are swapped for the official icon from the 1,285-shape library. This is most useful for the first pass, which is the part people avoid because a blank canvas is harder than an edit.
Sharing outside the workspace
A board can be published through a public link, which is how you show an architecture sketch to a contractor or a client without provisioning them a seat. The link can be revoked.
Are whiteboards included on the free plan?
Yes. Planner.day whiteboards sit inside the project workspace, next to the tasks and chat they explain, and are included on every plan, including Free. Several people can edit one board at once with visible cursors, draw from 1,285 official architecture shapes, and share a board through a revocable public link.
Where they fit
Boards belong to the workspace, so the diagram for a project sits with the project, next to the tasks and conversations it explains, and stays current because the people doing the work see it every day.
How the prompt-to-diagram feature and the 1,285 official shapes work is written up in Whiteboards that draw themselves.