Regex Tester & Debugger

Test regular expressions live with instant match highlighting, capturing groups, and regular expression cheat sheet.

Regular Expression Pattern

//gi

Global (g) Case-insensitive (i) Multiline (m) Dotall (s)

Test Text

Match #1: support@livintools.com (Index: 19)
Group $1: support
Group $2: livintools.com

Match #2: sales@example.org (Index: 45)
Group $1: sales
Group $2: example.org

Regex Quick Reference Cheat Sheet

. — Any character except newline
\w — Word character (a-z, A-Z, 0-9, _)
\d — Digit (0-9)
\s — Whitespace character

+ — 1 or more times
* — 0 or more times
? — 0 or 1 time (optional)
{n,m} — Between n and m times

^ — Start of line
$ — End of line
(...) — Capturing group
[abc] — Character set