System Design Canvas

Free browser-based tool for sketching system architectures with drag-and-drop components.

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System Design Canvas is a free, open-source, browser-based tool for sketching system architectures by dragging and connecting services, databases and queues, with templates and export to PNG, SVG or Mermaid, running entirely client-side with no sign-up. It's aimed at developers who want to think through a system's architecture visually before building it, instead of an erasable whiteboard or an unread document.

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