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4 templates · State diagram

Finite Automaton Diagram Examples

Finite automaton diagrams are essential tools for understanding theoretical computer science concepts like deterministic and non-deterministic finite automata (DFAs and NFAs). Whether you're studying for a class or designing a lexical analyzer, these visual state diagrams help you grasp state transitions and acceptance conditions quickly.

Standard OMG UML 2.5.1 §14 + Harel (1987) statechartEngine schematex-stateExport SVG · PNG · PDF
4 templates
State diagram Finite Automaton
DFA: Even number of 1sDFA: Even number of 1sFinite AutomatonUse template →DFA for Binary Numbers Divisible by 3DFA for Binary Numbers Divisible by 3Finite AutomatonUse template →NFA for Strings Ending in 01NFA for Strings Ending in 01Finite AutomatonUse template →Mealy Machine for Sequence DetectionMealy Machine for Sequence DetectionFinite AutomatonUse template →

Nothing close enough? Start from a blank state diagram → Describe it in one paragraph.

How to

How to use a state diagram template.

  1. 01Plan your automaton

    Decide on the states, input alphabet, start state, and accepting states. Sketch on paper if needed.

  2. 02Use the state diagram maker

    Open our tool and start adding state circles. Label each state for clarity.

  3. 03Draw transitions

    Connect states with arrows and label each transition with the input symbol that triggers it.

  4. 04Mark start and accept states

    Add an arrow from nowhere to denote the start state, and double-circle the accepting states.

  5. 05Share or export

    Once done, export your finite automaton diagram as an image or share a live link for collaboration.

FAQ

Questions about state diagram templates

What is a finite automaton diagram?

A finite automaton diagram is a visual representation of a finite automaton, a mathematical model of computation used in computer science to design and analyze algorithms for pattern matching, language recognition, and more. It shows states as circles and transitions as labeled arrows.

What's the difference between DFA and NFA diagrams?

In a DFA (deterministic finite automaton) diagram, each state has exactly one transition for each input symbol, leading to a single next state. In an NFA (nondeterministic finite automaton) diagram, a state may have multiple transitions for the same symbol, or none, and may include epsilon transitions.

Can I create an NFA with epsilon transitions using your tool?

Yes, our state diagram maker supports epsilon transitions. You can label any transition with the empty string (ε) to model nondeterminism.

Is the finite automaton diagram tool free?

Absolutely, the core diagramming features are free to use. You can create, edit, and export as many automaton diagrams as you need without any cost.

How do I simulate my automaton to see if it accepts a string?

While our tool focuses on diagram creation, you can manually trace the transitions using your diagram, or integrate it with simulation tools. We recommend exporting your diagram and using an automaton simulator for testing.