Sketch & ship system designs.
A hand-drawn whiteboard meets a database schema designer. Everything renders in your browser — no servers, no setup. Sign in to save your work, or jump in anonymously.
No account required — start drawing instantly.
Excalidraw-style
Hand-drawn whiteboard
Sketchy rectangles, ellipses, arrows, free-pen, text and more. Pan, zoom, undo, export to PNG.
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Eraser.io-style
Schema-as-code
Write tables in a tiny DBML-like syntax. Watch the diagram update live, with foreign-key arrows auto-routed.
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Server-light
Rendering, persistence and exports all run client-side. The server only handles auth.
Local-first
Your drawings live in localStorage. They survive refreshes; they don't leave your browser unless you choose to share.
Free to try
The whole tool works without an account. Sign up only if you want to organise your saved canvases.