Pushdown Automaton Visualizer
Interactive pushdown automaton simulator. Step through context-free grammar recognition using a stack-based machine, and see how PDAs recognize languages that finite automata cannot, such as balanced brackets and nested structures.
By Mohamed Habib Jaouadi•September 1, 2025•
Post Related
#automata
#pushdown-automaton
#context-free-grammar
#formal-languages
#theory
#parsing
Pushdown Automaton: Accepts aⁿbⁿ
A PDA that accepts equal numbers of a's followed by b's. Uses a stack to count.
States
Stack
Empty
Input:
Language: L = { aⁿbⁿ | n ≥ 0 } — Context-Free, not Regular