Regex Visualizer
Visualize regular expressions to help understand complex regex patterns.
Regular Expression
Test Match
Common Regex Cheatsheet
Usage Guide
Features
The regex visualization tool breaks down a regex expression into visual tokens, color-coded by type: character matching, character sets, anchors, groups, quantifiers, escapes, alternation, and dot. Each token shows its description and raw string. Also supports real-time matching with test strings, showing match positions and capture groups to help developers quickly understand complex regex.
Steps
Enter a regex string in the "Regular Expression" card (or click "Sample" or a preset below to auto-fill). Select match modifiers (g/i/m/s) on the right. The "Visual Parse" area displays each token; "Parse Description" gives an overall summary. Enter a test string in the "Test Match" card; all match results with their capture groups and index positions will be listed below.
Token Type Descriptions
Char (literal), Charset ([...]), Anchor (^/$/boundary), Group ((...)), Quantifier (*/+/{n,m}), Escape (\d/\w etc.), Alternation (
Notes
This tool uses a simplified parser and may not fully recognize deeply nested groups, backreferences, lookbehinds, and other advanced features. Parse results are for reference only; verification against the target language's official regex documentation is recommended. When an invalid regex is entered, a syntax error will be displayed; check that brackets, quantifiers, etc. are properly paired.