Regex → Finite State Machine Visualizer
Regular expression:
Build FSM
Clear Regex
Supports: literals,
|
(alternation),
*
+
?
, grouping
()
,
.
(any char), and character classes like
[a-z]
/
[^abc]
.
Test string:
Run
Clear String
Speed:
inactive state
active state
accepted
rejected / dead end