BI · Free template
C4 context diagram template — free online editor
System in context with external actors. Edit in your browser, export PNG/SVG/PDF, and share a view link.
Common use cases
- Show your system among users and external services
- Explain big-picture architecture to non-technical stakeholders
- Start C4 documentation at context level
C4Architecture
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From diagram to shipped software
Many clients start with a diagram in NorthIRdev, approve the architecture in the client portal, then hire us to build the production app — portals, payments, automation, and AI where it helps.