Excalidraw
excalidraw.com
Hand-drawn-looking whiteboard that opens instantly with no sign-up
No sign-upOn device
Loading page
tldraw.com
Infinite canvas that feels like a native app in a browser tab.
A drawing surface with unusually good feel — arrow binding, snapping and text handling that behave the way you expect rather than the way a web canvas usually does. Boards persist in the browser, sharing a room link puts other people on the same canvas, and you can drop images, embed live websites and paste video onto it. Free rooms are public to anyone with the link, and there are no permissions beyond that.
Questions
Works the moment the page loads. No account, no email, no trial. Shared rooms are open to anyone holding the link — there are no accounts or access controls.
No. tldraw does the work inside your browser, so the file never leaves your device — you can load the page, disconnect from the network, and it still works. That makes it a reasonable choice for material containing personal data.
Shared rooms are open to anyone holding the link — there are no accounts or access controls.
Alternatives
Same category or same task, ordered by how closely they overlap.
excalidraw.com
Hand-drawn-looking whiteboard that opens instantly with no sign-up
markmap.js.org
Turns a Markdown outline into a collapsible mind map as you type
wireframe.cc
Draw a rectangle and it guesses which UI element you meant
asciiflow.com
Draws boxes and arrows as plain ASCII you can paste into a comment
coggle.it
Mind maps that stay readable as branches multiply
diagrams.net
Full diagram editor that works without an account or a saved file