Free AI Sequence Diagram Generator
Transform interaction descriptions into professional UML sequence diagrams instantly. Describe the message flow between components and AI creates the visual diagram.
What is the AI Sequence Diagram Generator?
The Flowova AI Sequence Diagram Generator is a free online tool that converts interaction descriptions into UML sequence diagrams automatically. Describe how components, services, or actors communicate - the messages they send, the order of interactions, and conditional flows - and watch the AI create a properly formatted sequence diagram. Perfect for API documentation, system design, and software architecture visualization.
How to Use This Free Tool
Describe the Interaction
Explain how components communicate. Include the actors/systems involved, the messages they exchange, and the sequence of interactions.
- API call sequences
- Service interactions
- User-system communication
AI Creates Your Diagram
Our AI identifies participants, messages, and the sequence of interactions, then generates a proper UML sequence diagram with lifelines and arrows.
- Automatic participant detection
- Message ordering
- Return value handling
Customize and Export
Edit participants, messages, and styling. Export free to PNG for presentations, SVG for documentation, or Mermaid code for developer docs.
- Visual editing
- Professional themes
- Multiple export formats
Powerful Features
UML-Compliant Output
Generates proper UML sequence diagrams with lifelines, activation boxes, synchronous/asynchronous messages, and return arrows.
API Documentation
Document REST API flows, GraphQL queries, or RPC calls. Show how requests flow through your services.
Microservice Interactions
Visualize how microservices communicate - service-to-service calls, event publishing, and message queue interactions.
Authentication Flows
Document OAuth flows, JWT authentication, session management, and other security-related sequences.
Conditional Sequences
Show alternative paths with alt/opt fragments. Document what happens in success vs error scenarios.
Loop and Async Support
Represent loops, parallel execution, and asynchronous operations in your sequence diagrams.
Why Choose This Free Tool?
Faster API Documentation
Create sequence diagrams for your API docs in seconds instead of hours. Keep documentation in sync with your code.
Better Design Reviews
Use sequence diagrams in design reviews to visualize and discuss interaction patterns before implementation.
Clearer Communication
Explain complex system interactions to stakeholders with visual diagrams instead of lengthy text descriptions.
Interview Preparation
Practice system design by quickly creating sequence diagrams for common patterns like authentication, payments, etc.
Debug Complex Flows
Visualize message flows to understand and debug complex multi-service interactions.
Onboarding Documentation
Help new developers understand system architecture with clear sequence diagrams of key flows.
Who Can Benefit?
Backend Developers
Document API endpoints and service interactions
Solutions Architects
Design and communicate system interactions
Technical Writers
Create sequence diagrams for technical documentation
QA Engineers
Visualize test scenarios and interaction flows
Students
Learn UML and practice system design concepts
Engineering Managers
Review and discuss system designs with teams
Frequently Asked Questions
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