Which regex engine is used?

The tool uses the JavaScript RegExp engine, which follows the ECMAScript specification.

Does it show capture groups?

Yes. Named and numbered capture groups are displayed with their matched values.

Is my data sent to a server?

No. All matching runs securely in your browser without uploading.

Developer

Regex Tester

Test regular expressions with live match highlighting.

//g

Flags:g=global · i=case-insensitive · m=multiline · s=dotAll

Quick:

Test string

Matches

Highlighted matches appear here…

Uses JavaScript's RegExp engine. Matches are highlighted in real time.

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