Regex Tester
Live match highlighting, capture groups, and replace preview.
Matches
| # | Match | Groups | Index |
|---|
Replace
How it works
The pattern is compiled with JavaScript's native RegExp engine
using the flags you select. Matches are highlighted in the test string, and
each match's capture groups are listed in the table below. The replace
section runs String.replace() live so you can preview a
substitution before using it elsewhere. Everything runs locally in your browser.