Zoom out to the big picture. A C4 context diagram shows your entire system, who uses it, and what it depends on perfect for onboarding and stakeholder reviews.
Generate C4 Context DiagramThe C4 Context diagram is Level 1 of the C4 model. It draws a single box for your whole system, surrounded by the users who interact with it and the external systems it depends on.
This is the ideal starting point for any architecture discussion. It answers the question "what is this system, and how does it fit into the world?" without drowning the reader in internal details.
Give engineers and PMs an instant mental model of system boundaries before they touch code.
Explain scope and external dependencies to non-technical stakeholders in one simple picture.
Show how your system fits into a larger ecosystem of internal and third-party services.
Clarify what is in-scope and what is external before committing to a design.
Try a prompt: "The system is a customer support portal. Its users are customers and support agents. It depends on an email service, a payments provider, and an internal CRM."
Everything you need to know about generating C4 context diagrams.