Regex Tester

Test a regular expression against your text as you type. Matches are highlighted, capture groups are listed, and a preset library drops in a common pattern with one click. Nothing is uploaded.

Standard JavaScript regex syntax. No slashes, no surrounding flags.

Flags
Presets
0 matches

Matches

  1. Matches will appear here as you type.

The JavaScript RegExp engine runs entirely in your browser. The pattern, test text, and matches never leave this page — there are no network calls.