Online Whiteboard

No — deliberately. Strokes live in the page's memory only: nothing uploads, nothing writes to your device, and a refresh clears the board completely. That's the right trade for a quick-thinking surface (no account, no sync, nothing of yours on a server), with one behavioral rule attached: hit the PNG button before closing anything you want to keep. The export is a full-resolution image of exactly what you see, white background included.

Drag from one corner to the opposite corner: the line tool draws start-to-end, rectangle uses your drag as its bounding box, and ellipse inscribes in that same box (drag a square-ish area for a circle). Shapes preview live while dragging and commit on release, so a misplaced one is a single undo away. Everything is stroke-based — shapes and pen marks all sit in one undo history, newest first.

The raw input — a series of points arriving as your pointer moves — gets rendered through quadratic curves between midpoints rather than straight segments, which turns the polygonal jitter of fast strokes into continuous curves. It's the standard technique good drawing apps use. Pressure isn't simulated: a stylus draws at the selected size regardless of force, which keeps behavior identical across mouse, finger, and pen.

Not on this one — real-time collaboration requires a server relaying every stroke, which is precisely the architecture this tool exists to avoid (and the reason collaborative whiteboards need accounts). For working together in person, one screen and a stylus does fine; for remote, screen-sharing this page works surprisingly well since strokes render live. If you need true multi-cursor collaboration, that's a different product category with different privacy trade-offs.