SysCanvas

SysCanvas — System design diagrams, right from your phone
Sketch clean architecture diagrams anywhere. Whether you're planning a new service, documenting an existing system, or just thinking through an idea, SysCanvas takes you from a blank canvas to a clear, presentable diagram in minutes.
WHY SYSCANVAS
• Fast and tactile — tap to add, drag to arrange, link to connect
• Works offline — your designs stay on your device
• No account, no clutter — just open and draw
• Colour-coded nodes that read at a glance
READY-MADE TEMPLATES
Start instantly from common architectures, then make them your own:
• URL Shortener (TinyURL)
• News Feed (Twitter / Instagram)
• Chat System (WhatsApp / Messenger)
• Rate Limiter
• Video Streaming (YouTube / Netflix)
• Web Crawler & Search Index
…or begin from a blank canvas.
REAL BUILDING BLOCKS
Drop in the components every architecture needs — Client, Load Balancer, API Service, Cache, Database, Object Storage, Message Queue, CDN and more. Each node is labelled and colour-coded so your diagram stays easy to follow.
CONNECT LIKE SYSTEMS REALLY WORK
• Draw arrows between any two nodes with the link tool
• Label connections (e.g. "read", "store raw", "async fan-out")
• Make links async (dashed) or two-way
EDIT WITH EASE
• Drag nodes to reposition
• Tap to rename, change type or colour, or delete
• Resize the canvas for big systems — pinch to zoom, drag to pan, Fit to re-centre
SHARE & BACK UP
• Save as PDF for a printable, shareable diagram
• Export a design file (.json) to send or back up
• Back up all designs and restore them on any device
PERFECT FOR
• Engineers planning microservices, data flows and infrastructure
• Students learning software architecture
• Teams documenting and reviewing system designs
• Anyone who thinks better with a diagram
Open SysCanvas and turn your next system into a clear picture.