Describe transition logic between different states of an object, suitable for state machine design, business rule analysis and complex system modeling.
A state diagram is a UML diagram used to describe the state transition process of an object or system. It shows behavior changes of an object under different conditions through state nodes and state transition relationships. State diagrams are suitable for analyzing systems with lifecycle characteristics, such as order states, user states, device running states and state transition logic in business processes.
Describe the state changes of an object from creation, execution to completion, helping understand complex behavior logic.
Suitable for business process design with multiple phase changes, such as orders, users and tasks.
Show state transitions and response rules of a system triggered by different events.
Define special states such as errors, failures and recovery to help improve system stability design.
Provide clear design references for developers implementing state control logic.
You can generate state diagrams by writing Mermaid code, pasting Mermaid code, AI generation, image recognition, code summary and more. You can also draw state diagrams using our built-in state diagram templates.
After entering Mermaid syntax, state diagrams are generated and previewed in real time, with support for custom state diagram styles and themes.
You can download state diagrams and save them locally. We support exporting state 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 state diagram again in the ProcessOn editor.
A Mermaid state diagram is a UML diagram used to describe the state transition process of an object or system, showing the logic of a system moving from one state to another through state nodes and transition relationships.
Mermaid state diagrams are widely used in software state machine design, order flow analysis, device running state management, user lifecycle analysis and business rule modeling.
Mermaid state diagrams support state nodes, state transitions, conditions, start states and end states, clearly expressing state flow relationships in complex systems.
Mermaid flowcharts mainly show task execution steps and business processes, while Mermaid state diagrams focus more on the change process of an object between different states, such as the state evolution of an order from creation to completion.
When creating a Mermaid state diagram, simply use state diagram syntax to define state nodes and transition rules, and the editor will automatically generate the corresponding state relationship diagram from the code.