Model the real hierarchy
Compose atomic, compound, parallel, and final states without flattening away the structure that matters.
Design statecharts on a canvas built for their real complexity. Inspect every transition, validate the structure, and leave with portable XState-compatible code.
Designed for the hard part
State machines become difficult at the seams: nested states, competing branches, eventless transitions, and targets that cross the hierarchy. XStatium makes those seams visible.
Compose atomic, compound, parallel, and final states without flattening away the structure that matters.
Surface unreachable states, dead ends, invalid targets, and unsafe conditional branch ordering before implementation.
Edit events, guarded branches, always transitions, actions, and metadata from one contextual inspector.
Import and export validated machine JSON, or generate clean XState v5-compatible TypeScript whenever you are ready.
From idea to implementation
Create states, nest the hierarchy, and drag to connect transitions. Auto-layout keeps the canvas legible as the model grows.
Add guards and actions, order conditional branches, inspect context, and run structural validation against the canonical machine.
Export the machine as validated JSON or XState v5-compatible TypeScript. The design remains yours, with no proprietary runtime.