Visualize the interaction process between system objects, helping developers sort out interface calls, message passing and business sequence logic.
A sequence diagram is a UML diagram used to describe the interaction process between objects, systems or services. It shows message passing, call relationships and response processes in chronological order. Through elements such as participants, message lines and lifelines, sequence diagrams clearly express the collaboration logic inside a system or between different modules. They are commonly used in software design, interface analysis, system architecture design and business process modeling.
Show the chronological interaction between users, systems and services to help understand the complete business chain.
Describe API requests, responses and data passing between services, supporting interface design and troubleshooting.
Simulate user operation flows and system response processes for product design and requirement analysis.
Show call relationships between modules, helping developers plan system structure and service communication methods.
Sort out test scenarios based on system interaction flows to ensure functional verification covers key business paths.
You can generate sequence diagrams by writing Mermaid code, pasting Mermaid code, AI generation, image recognition, code summary and more. You can also draw sequence diagrams using our built-in sequence diagram templates.
After entering Mermaid syntax, sequence diagrams are generated and previewed in real time, with support for custom sequence diagram styles and themes.
You can download sequence diagrams and save them locally. We support exporting sequence diagrams to PNG, PDF, SVG, JPG, Markdown and other formats, or clicking the “Share” button to share the link with others.
If you are not satisfied with the result, click the “Visual editing” button to edit the sequence diagram again in the ProcessOn editor.
A Mermaid sequence diagram describes the chronological interaction process between objects, systems or services, clearly showing requests, responses and message passing relationships.
Mermaid sequence diagrams are commonly used for API call flows, system interaction design, user operation flows, microservice communication and software architecture analysis.
Users can define participants, messages and interaction order with Mermaid sequence diagram syntax, and the editor will automatically generate the corresponding sequence diagram. AI can also generate sequence diagram code from text descriptions.
Mermaid sequence diagrams support participants, messages, loops, conditions, activation states and other elements to express complex software interaction logic.
Yes. Generated Mermaid sequence diagrams can be embedded in Markdown documents, development docs and project descriptions, helping teams understand system interaction flows.