External
tldraw
A very fast infinite canvas for thinking out loud.
tldraw is a free infinite canvas whiteboard in the browser: draw, arrange, connect and share with multiplayer rooms. It doubles as the demo of the tldraw canvas SDK, which is why the whiteboard itself is so quick and polished.
Best for: Use this when you want a slick, instant whiteboard for a quick multiplayer thinking session.
Pros
- Extremely responsive canvas, even on big boards
- Multiplayer rooms with a simple share link
- No account needed to start drawing
Cons
- Fewer diagram-specific shape libraries than dedicated tools
- Boards live in the browser unless you export or share them
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