Free State Machine Generator
Create UML state machine diagrams with our free tool. States, transitions, and guards.
- State and composite state notation
- Transitions with triggers and guards
- Entry, exit, and do actions
- Initial and final states
- History and junction pseudostates
- Export as PNG, SVG, or code
Frequently Asked Questions
When should I use state machine diagrams?
Use them when an object's behavior depends on its history and current state. User sessions, order workflows, and UI components with distinct modes benefit from state modeling.
What are guards?
Guards are conditions on transitions - the transition only fires if the guard is true. For example, [balance > 0] guard on a withdraw transition.
Can I generate code from my diagram?
Yes! Export as state machine code for JavaScript or other languages. The generated code implements your states and transitions as executable logic.