RegEx Railroad Visualizer
Visualize complex regular expressions as clear, intuitive railroad flow diagrams. Decompose groups, character classes, and quantifiers visually
Presets:
Modifiers: /{{ flags || '-' }}
{{ node.text }}
Enter a regular expression above to visualize railroad track
Match Result:
Match Result Preview:
Matches found: {{ matches.length }}
Match Details & Capture Groups:
#{{ mi + 1 }}: "{{ m.value }}"
[{{ m.groups.filter(g => g !== undefined).join(', ') }}]
+{{ matches.length - 10 }} more matches
Railroad diagrams (syntax diagrams) visualize regex matching pathways left-to-right as a train track. Each node represents a required literal, character class, or repeatable group, transforming complex text pattern logic into intuitive visual clarity.
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