Regex Tester

Test and debug regular expressions with live matching and replacement

Regular Expression

Enter your regular expression and test string

Regex Pattern

Flags

g: global, i: case-insensitive, m: multiline, s: dotAll, u: unicode, y: sticky

Test String

Match Results

View matches and highlighted text

Match results will appear here

Text Replacement

Replace matched text with custom replacement

Replacement Text

Use $1, $2, etc. to reference capture groups

Regex Cheat Sheet

Common regex patterns and their meanings

\w - Word character (a-z, A-Z, 0-9, _)

\d - Digit (0-9)

\s - Whitespace

. - Any character (except newline)

[abc] - Any character in brackets

[^abc] - Any character not in brackets

* - Zero or more

+ - One or more

? - Zero or one

{n} - Exactly n times

{n,} - n or more times

{n,m} - Between n and m times