# C4 Model Diagrams: A Clear, Search-Friendly Guide for Modern Software Teams

> A deep C4 model guide with when to use Context, Container, Component, and Code diagrams, plus practical conventions and review checklists for teams.

Canonical: https://unidiagram.davidtran.dev/blog/c4-model-diagram-guide

- Published: 2025-12-30
- Reading time: 13 min
- Author: UniDiagram Team
- Tags: c4 model, architecture diagram, software architecture, diagram as code, engineering, documentation

A deep C4 model guide with when to use Context, Container, Component, and Code diagrams, plus practical conventions and review checklists for teams.

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