AI Workspace for Diagrams & Collaboration
The C4 model is a hierarchical software architecture visualization framework invented by Simon Brown. It organizes architecture diagrams into four abstraction levels — Context, Container, Component, and Code — providing a structured, hierarchical approach that helps teams document and communicate software systems clearly at any level of detail.
Each C4 level zooms in on a different granularity: the Context diagram shows how your system fits into the world; the Container diagram reveals the major applications and services; the Component diagram breaks down the internals of each container; the Code diagram shows the implementation details. Together, they give every stakeholder — from executives to junior developers — exactly the level of detail they need.
Cloudairy's AI C4 Model Diagram Tool goes beyond manual drawing. Describe your system in plain English — "microservices banking platform with a React web app, mobile app, API gateway, and PostgreSQL databases" — and the AI generates all four C4 levels instantly, using correct notation as defined by Simon Brown. Pair your C4 diagrams with an AI UML diagram generator for class and sequence diagrams, or use the AI system design diagram maker for broader architecture views.
Go from system description to a complete C4 model — all four levels — in four steps. No DSL syntax to learn, no templates to assemble from scratch.
Type a plain-English description of your system in the AI prompt box. For example: "SaaS multi-tenant platform with a React frontend, Node.js API, PostgreSQL, Redis cache, and an event-driven notification service." Or choose one of the example chips — e-commerce checkout, microservices banking, real-time chat, ML pipeline, or API gateway.
Cloudairy's AI generates the full C4 hierarchy — Context, Container, Component, and Code levels — with correct shapes, colors, relationships, and labels as defined by Simon Brown's C4 specification. No manual shape dragging required.
Navigate between the four C4 levels in the editor. Drill from Context into Containers, then into Components. Edit labels, add annotation notes, adjust relationships, and insert additional elements. The editor understands C4 semantics — not just shapes.
Export to Structurizr DSL (.dsl), PlantUML, Mermaid.js, Visio (.vsdx), SVG, PNG, or PDF. Or copy a shareable live link for view-only or collaborative editing with your team — no account required for viewers.
Join thousands of software architects, engineering managers, and developers who use Cloudairy to create C4 model diagrams in seconds. All 4 levels. Correct notation. Real-time collaboration.
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Cloudairy is the only tool that generates all 4 C4 levels from a single prompt, validates C4 notation per Simon Brown's specification, and exports to Structurizr DSL — all in one free platform.
Describe your software system in natural language and get a complete, properly structured C4 diagram hierarchy in seconds. No DSL syntax to learn, no templates to piece together. The AI understands C4 semantics, service boundaries, and data flows.
Generate Context, Container, Component, and Code diagrams from a single prompt — or create each level individually and link them. Navigate between levels in the editor, drill down from Context to Code, and maintain a consistent architecture story across all four abstraction levels.
Cloudairy validates C4 notation per Simon Brown's specification — correct shapes, colors, and relationship arrows for every element. People, software systems, containers, and components are always rendered with the right visual language. No guessing what shape to use.
Export any C4 diagram to Structurizr DSL, PlantUML, or Mermaid.js — the three most widely used code-first C4 formats. Create a bidirectional workflow: design visually in Cloudairy and export to your existing C4 toolchain. Migrate from Structurizr seamlessly.
Work on the same C4 diagram simultaneously with your team. Live cursor presence, inline comments, and @mentions keep architects, engineers, and product managers aligned. Share view-only or edit links — no account required for viewers.
Export finished C4 diagrams to Visio (.vsdx), draw.io (.drawio), SVG, PNG, or PDF for enterprise deliverables and documentation systems. Import existing draw.io diagrams into Cloudairy for AI-assisted C4 conversion.
Start with a professionally designed C4 template and customize it for your software system. Each template covers all four C4 levels and is fully editable and AI-extendable.
See how Cloudairy compares to the tools currently used for C4 model diagrams.
| Capability | Cloudairy | Structurizr | IcePanel | draw.io | Miro | Mermaid.js | Lucidchart |
|---|---|---|---|---|---|---|---|
| AI prompt → C4 diagram | Yes | No | No | No | No | No | No |
| All 4 C4 levels | Yes | Yes | Yes | Partial | Partial | Yes | Partial |
| C4 notation validation | Yes | Yes | Yes | No | No | Partial | No |
| Real-time collaboration | Yes | No | No | Limited | Yes | No | Yes |
| Structurizr DSL export | Yes | Native | No | No | No | No | No |
| PlantUML export | Yes | No | No | No | No | Native | No |
| Free tier available | Yes | Yes | No | Yes | Limited | Yes | Limited |
Software Architects
Design and document software systems at every level of abstraction. Generate the full C4 hierarchy from a prompt, refine in the editor, and export to Structurizr DSL for integration with your architecture-as-code workflow.
Engineering Managers
Produce C4 diagrams for onboarding, architecture reviews, and technical roadmap presentations. The AI generates a complete system overview in minutes — no diagramming tool expertise required.
DevOps Engineers
Map service boundaries, deployment targets, and infrastructure dependencies using C4 Container and Component diagrams. Keep diagrams in sync with code using shareable live links and version history.
Technical Writers
Produce accurate, up-to-date architecture documentation without relying on engineering schedules. Describe the system in plain English and generate C4-compliant diagrams that drop into documentation portals.
Students & Certification Candidates
Learn software architecture by doing — generate C4 diagrams for real-world systems from a single sentence. Ideal for software architecture courses, certifications, and portfolio projects.
Model software architecture with AI-generated class diagrams, sequence diagrams, component diagrams, and deployment diagrams.
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Generate high-level system design diagrams from plain text. Ideal for architecture proposals, technical interviews, and design documentation.
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Generate entity-relationship diagrams for the databases and storage systems in your C4 Container diagrams from plain English descriptions.
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Generate multi-cloud architecture diagrams for AWS, Azure, and GCP — ideal for documenting the deployment environment of your C4 systems.
Learn more →The C4 diagram is a hierarchical software architecture visualization model invented by Simon Brown. It organizes diagrams into four abstraction levels: Level 1 — System Context (shows how your software fits into the world), Level 2 — Container (shows the high-level technology choices and how containers communicate), Level 3 — Component (shows the components inside a container), and Level 4 — Code (class diagrams or similar). Cloudairy's AI generates all four C4 levels from a single plain-English description.
The C4 pattern — Context, Container, Component, Code — is a lean software architecture documentation framework created by Simon Brown. Unlike UML, which can become overly complex, C4 provides just enough structure for teams to understand and communicate software systems at different levels of detail. It is used by software architects, engineering managers, and development teams worldwide.
Use a C4 diagram when you need to document and communicate software architecture: before coding a new system (architecture design), during onboarding (helping new engineers understand the system), for compliance documentation, in architecture review boards, or when planning a migration or refactor. The C4 model is especially useful for microservices architectures where container and component boundaries matter.
The four C's in the C4 model are: (1) Context — the big picture, showing your system and how it interacts with users and external systems; (2) Container — the applications, databases, and services that make up your system; (3) Component — the major structural building blocks inside a container; (4) Code — the implementation details, often shown as class diagrams. Cloudairy's AI generates all four levels from one prompt.
Yes. Cloudairy generates all four C4 abstraction levels — System Context, Container, Component, and Code — from a single plain-English description of your software system. You can drill down from the Context level into Containers and Components, or generate all levels simultaneously and refine them in the editor.
Yes. Cloudairy supports export to Structurizr DSL (.dsl), PlantUML, and Mermaid.js — the three most popular code-first C4 formats — as well as Visio (.vsdx), SVG, PNG, and PDF. This gives teams a bidirectional workflow: design visually in Cloudairy and export to the format used by your existing C4 toolchain.
Yes. Cloudairy's free tier includes access to the AI C4 Model Diagram Tool, all four C4 levels, and PNG export. Premium plans unlock Structurizr DSL export, Visio export, unlimited boards, and full team collaboration features.
See how software architects, engineering managers, and developers use Cloudairy to create C4 model diagrams faster and with better results.
As a software architect, C4 diagrams are my primary communication tool. Cloudairy generates all four levels from a single description — I can produce a complete architecture document for a sprint review in minutes.
Cloudairy makes C4 diagramming so approachable. I can create system context diagrams for client proposals instantly and focus on the architecture discussion, not the drawing.
I'm studying software architecture and C4 was always intimidating until I tried Cloudairy. I generate a full C4 hierarchy for any system in seconds — it's the best way to learn the methodology.
I use Cloudairy to teach C4 diagrams in my architecture courses. Students can generate their first C4 diagrams on day one instead of spending weeks learning Structurizr DSL.
Our team uses Cloudairy to document every microservice in our platform as a C4 Container diagram. The Structurizr DSL export means our diagrams stay in sync with our architecture-as-code repository.
Cloudairy safeguards your work with enterprise-grade security, compliance, and access controls — so your teams can create, collaborate, and scale with confidence.
Cloudairy is SOC 2 Type Ⅱ certified and penetration tested annually, ensuring your architecture diagrams and data meet the highest standards for security and reliability.
We comply with the European Union General Data Protection Regulation (GDPR) and extend it to all our customers even those outside of the EU.
Our Information Security Management System is ISO 27001 certified — the leading global standard for information security.
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