Regex Tester

Test regular expressions online with live matching, group extraction, and replacement. Generate code for JavaScript, Python, Go, and more with flag settings and pattern debugging

Regex Pattern

//g

Flags

Test String

Common Regex Patterns

EmailURLIPv4 AddressPhone NumberDate (YYYY-MM-DD)Hex ColorHTML TagJapanese Characters

Regex Quick Reference

Pattern	Description
.	Any single character
\d / \w / \s	Digit / Word char / Whitespace
[abc]	Any of a, b, or c
[^abc]	Not a, b, or c
a\|b	a or b
a*	0 or more of a
a+	1 or more of a
a?	0 or 1 of a
a{3}	Exactly 3 of a
^	Start of line
$	End of line
(abc)	Capture group
(?:abc)	Non-capture group
(?<name>abc)	Named capture group
(?=abc) / (?!abc)	Positive / Negative lookahead