117 tools

Regex Tester

Test regular expressions with live matching and group highlighting. Supports global, case-insensitive, multiline, and dotAll flags.

Works offlineNothing uploaded

//g

Flags:

Test String

How to Use

Enter a regex pattern

Type your regular expression in the pattern field.

Paste test text

Enter the text you want to test your pattern against.

View matches

Matching portions are highlighted in real time with group details shown.

What regex syntax does this tool support?

It supports the full JavaScript RegExp syntax including lookahead, lookbehind, named groups, and Unicode property escapes.

What flags are available?

Global (g), case-insensitive (i), multiline (m), and dotAll (s). You can toggle each flag independently.

Does this tool send my regex or test text to a server?

No. Everything runs on your computer using native JavaScript RegExp. Nothing is sent to a server.

Can I see capture groups?

Yes. Each match shows its full match and any named or numbered capture groups.

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