Nothing close enough? Start from a blank network diagram → Describe it in one paragraph.
How to use a network diagram template.
- 01Choose your C4 level
Select whether you need a System Context, Container, or Component diagram based on your audience and the level of detail required.
- 02Identify the main elements
List the key actors, software systems, containers, or components that make up your architecture.
- 03Add relationships and dependencies
Draw arrows to show how elements interact, including data flow, API calls, or message passing.
- 04Label and annotate clearly
Use consistent naming and add brief descriptions to clarify the responsibility of each element.
- 05Generate and refine
Preview your diagram, adjust the layout, and export or embed it where needed.
Questions about network diagram templates
What are the four levels of C4 model diagrams?
The four levels are System Context, Container, Component, and Code. They provide increasing detail about a software system, from its external interactions down to individual classes or functions.
How do I choose which C4 level to use?
Choose based on your audience: System Context for non-technical stakeholders, Container for high-level technical architecture, Component for developers, and Code for detailed implementation.
Can I create C4 model diagrams for free?
Yes, our generator lets you create and download C4 model diagrams at no cost. You can start from a blank canvas or use one of the examples as a template.
What is the difference between System Context and Container diagrams?
A System Context diagram shows the software system and its external actors (users, external systems). A Container diagram zooms in to show the high-level technology choices like web apps, databases, and services.
How do I show databases or message queues in a C4 container diagram?
In a Container diagram, databases and message queues are represented as containers with their technology name (e.g., PostgreSQL, RabbitMQ) and connected to other containers with appropriate relationships.