Everything is ink.
Derivatives, drafts and diagrams live on one board. These are the tools the pen showed off on the way in.
Sub-pixel ink
A pen that lands exactly where your hand goes. Smooth curves, no jitter — equations in the margin stay legible.
Shapes that true up
Sketch a rough box and Todrawn straightens it. Arrows stay attached to what they connect, even when you move things around.
Images on the board
Drop PNG, JPEG, GIF or WebP files straight onto the canvas and arrange them next to your notes like prints on a desk.
Real-time collaboration
Invite people by email or hand them the board password. Cursors, strokes and edits land live for everyone at once.
Autosave, always
Every stroke is saved as you draw. Conflicting edits are caught and resolved — nothing is silently lost.
Quiet by design
The canvas is the product. Tools stay out of the way until you reach for them, and the board never shouts.