PlantUML definitions are available via the Structurizr CLI export command, using the -format plantuml parameter.

@startuml
title Software System - System Context

top to bottom direction

skinparam {
  shadowing false
  arrowFontSize 10
  defaultTextAlignment center
  wrapWidth 200
  maxMessageSize 100
}

hide stereotype

skinparam rectangle<<SoftwareSystem>> {
  BackgroundColor #1168bd
  FontColor #ffffff
  BorderColor #0b4884
  roundCorner 20
}
skinparam person<<User>> {
  BackgroundColor #08427b
  FontColor #ffffff
  BorderColor #052e56
}

person "==User\n<size:10>[Person]</size>" <<User>> as User
rectangle "==Software System\n<size:10>[Software System]</size>" <<SoftwareSystem>> as SoftwareSystem

User .[#707070,thickness=2].> SoftwareSystem : "<color:#707070>Uses"
@enduml

C4-PlantUML definitions are available via the Structurizr CLI export command, using the -format plantuml/c4plantuml parameter.

@startuml
title Software System - System Context

top to bottom direction

!include https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master/C4.puml
!include https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master/C4_Context.puml

Person(User, "User", "", $tags="Element+Person")
System(SoftwareSystem, "Software System", "", $tags="Element+Software System")

Rel_D(User, SoftwareSystem, "Uses", $tags="Relationship")

SHOW_LEGEND()
@enduml

Mermaid definitions are available via the Structurizr CLI export command, using the -format mermaid parameter. Your Mermaid configuration will need to include "securityLevel": "loose" to render this definition correctly.

graph TB
  linkStyle default fill:#ffffff

  1["<div style='font-weight: bold'>User</div><div style='font-size: 70%; margin-top: 0px'>[Person]</div>"]
  style 1 fill:#08427b,stroke:#052e56,color:#ffffff
  2("<div style='font-weight: bold'>Software System</div><div style='font-size: 70%; margin-top: 0px'>[Software System]</div>")
  style 2 fill:#1168bd,stroke:#0b4884,color:#ffffff

  1-. "<div>Uses</div><div style='font-size: 70%'></div>" .->2

WebSequenceDiagram definitions are available via the Structurizr CLI export command, using the -format websequencediagrams parameter. Only dynamic views are supported.

DOT definitions are available via the Structurizr CLI export command, using the -format dot parameter.

digraph {
  compound=true
  graph [fontname="Arial", rankdir=TB, ranksep=1.0, nodesep=1.0]
  node [fontname="Arial", shape=box, margin="0.4,0.3"]
  edge [fontname="Arial"]
  label=<<br /><font point-size="34">Software System - System Context</font>>

  1 [id=1,shape=rect, label=<<font point-size="34">User</font><br /><font point-size="19">[Person]</font>>, style=filled, color="#052e56", fillcolor="#08427b", fontcolor="#ffffff"]
  2 [id=2,shape=rect, label=<<font point-size="34">Software System</font><br /><font point-size="19">[Software System]</font>>, style=filled, color="#0b4884", fillcolor="#1168bd", fontcolor="#ffffff"]

  1 -> 2 [id=3, label=<<font point-size="24">Uses</font>>, style="dashed", color="#707070", fontcolor="#707070"]
}

Ilograph definitions are available via the Structurizr CLI export command, using the -format ilograph parameter. A single Ilograph export contains the model and all views.

resources:

  - id: "1"
    name: "User"
    subtitle: "[Person]"
    backgroundColor: "#08427b"
    color: "#ffffff"

  - id: "2"
    name: "Software System"
    subtitle: "[Software System]"
    backgroundColor: "#1168bd"
    color: "#ffffff"

perspectives:
  - name: Static Structure
    relations:
      - from: "1"
        to: "2"
        label: "Uses"

The Structurizr DSL (as mentioned on the ThoughtWorks Tech Radar - Techniques - Diagrams as code) allows you to create multiple diagrams based upon the C4 model, in multiple output formats, from a single DSL source file.