How to use
Type a pattern (without slashes), toggle flags and watch matches highlight live below along with capture groups for every hit.
Note
Uses the browser's native RegExp engine (JavaScript flavor). All testing happens locally.
Frequently asked questions
Slashes around pattern?
Do not include them; type the raw pattern only.
Too many matches slow?
Display caps at 500 matches but counting continues internally.
Lookahead support?
Yes, full JavaScript regex flavour including lookarounds.