Regex Tester

Test, debug, and verify your JavaScript regular expressions with real-time highlighting.

/ /

Test String

Match Result 0 Matches

Regex Cheatsheet

Character Classes

. Any character
\w Word char [a-zA-Z0-9_]
\d Digit [0-9]
\s Whitespace
[abc] Character set
[^abc] Negated set

Quantifiers

* 0 or more
+ 1 or more
? 0 or 1
{3} Exactly 3
{3,} 3 or more
{2,5} Between 2 and 5

Anchors & Flags

^ Start of line
$ End of line
\b Word boundary
g Global flag
i Case insensitive
m Multiline