Tool

Regex Tester

Test ECMAScript regular expressions locally with flags, match results, capture groups, and replace preview.

Runs locally in your browser

Pattern Flags Common flags: g i m s u y

Replacement Used only for the replace preview. Test text Results update as you edit the pattern, flags, and text.

2 matches found.

Replace Preview

Preview only. The source text is not overwritten.

<JSON> formatter
<json> validator

Matches

Match 1 · 0-4

JSON

Groups: JSON

Match 2 · 15-19

json

Groups: json