Regex Tester Lab
Test regular expressions on targeted text scopes with active global, insensitive, or multiline flag markers interactively.
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Regex Syntax Quick Cheat Sheet
| Character/Token | Description Mapping | Example Match |
|---|---|---|
| . | Any single character except newline | "a", "1", "%" |
| \d | Any single numeric digit (0-9) | "5", "9" |
| [a-z] | Any lowercase character character inside range | "b", "x" |
| + | Matches 1 or more repetitions of tokens | "aaa", "123" |
| ^ / $ | Start / End boundary points anchor indicators | Whole string check |