Developer

Regex Capture Group Tester

See every match and each numbered and named capture group.

Developer

Regex Capture Group Tester

Local only
Everything stays in your browser

Your text is processed on your device — nothing is uploaded to a server.

How it works

Uses your browser's JavaScript regex engine. Lists match index, full match, numbered groups and named groups.

Good to know

Frequently asked questions

How do I use it?

Enter your test text, adjust the options and press “Test”. Check the result, then copy or download it.

How does it work?

Uses your browser's JavaScript regex engine. Lists match index, full match, numbered groups and named groups.

Is my data uploaded?

No. Everything is processed in your browser and nothing is sent to a server. No account is needed.