How does the regex tester work?

Type a pattern and test string; matches highlight live with capture groups listed below.

Does it support flags and lookaheads?

Yes, common flags (g, i, m, s) and JavaScript regex features like lookaheads are supported.

Yes, it is completely free with unlimited testing.

Test regular expressions with flags, match highlighting, capture groups, and detailed match positions.

Regex input

//g

Global `g`Ignore case `i`Multiline `m`Dot all `s`

Test text

Match highlighting0 matches

Matches will appear here.

Match details

Type your regular expression pattern in the regex input.

Paste the text you want to test your pattern against.

Enable flags like global, ignore case, multiline, or dotAll.

Run the regex and view all matches with positions.