Real-time Engine · Capture Groups · Built-in Presets
Regular Expression Tester
Craft, test, and debug RegExp patterns against sample text with instant visual feedback and capture group introspection.
Presets:
//
Matches found: 2
Matched Tokens (2)
| # | Match | Index | Capture Groups |
|---|---|---|---|
| 1 | [email protected] | 14 | — |
| 2 | [email protected] | 41 | — |
JavaScript RegEx Cheat Sheet
Character Classes
- \d : Any digit [0-9]
- \w : Any word character [a-zA-Z0-9_]
- \s : Any whitespace (space, tab, newline)
- . : Any character except newline
Quantifiers & Anchors
- ^ / $ : Start of string / End of string
- * / + : 0 or more / 1 or more
- ? : Optional (0 or 1 match)
- {n,m} : Between n and m times