Regular Expression Engine
Regular Expression (Regex) Tester & Debugger
Real-time JavaScript regex parser with color-coded syntax matching, capture groups table, find & replace, and verified presets.
Verified Production Presets
Regular Expression Pattern
//gi
3 matches found
Contact us at support@botock.com or sales@enterprise.org. Personal: john.doe+dev@gmail.com
Extracted Matches & Capture Groups (3)
Match #1Index: 14
support@botock.com
Group $1:support
Group $2:botock.com
Match #2Index: 36
sales@enterprise.org
Group $1:sales
Group $2:enterprise.org
Match #3Index: 68
john.doe+dev@gmail.com
Group $1:john.doe+dev
Group $2:gmail.com
Regex Quick Reference
\dAny digit [0-9]
\wWord char [a-zA-Z0-9_]
\sWhitespace (space, tab, newline)
^ / $Start / End of string
+1 or more times
*0 or more times
?0 or 1 time (optional)
{n,m}Between n and m times
[...]Character set (e.g. [a-z])
(...)Capture group (accessible via $1)