Regex Tester & Debugger

Test and debug regular expressions with real-time highlighting.

Test String4 Matches

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Character Classes

.Any character except newline

\wAlphanumeric [a-zA-Z0-9_]

\dDigit [0-9]

\sWhitespace

[abc]Any of a, b, or c

[^abc]Not a, b, or c

[a-z]Character range a to z

Anchors

^Start of string/line

$End of string/line

\bWord boundary

Quantifiers

*0 or more

+1 or more

?0 or 1

{3}Exactly 3

{3,}3 or more

{3,6}Between 3 and 6

Groups & Lookaround

(...)Capturing group

(?:...)Non-capturing group

(?=...)Positive lookahead

(?!...)Negative lookahead

Escaped Characters

\.Dot

\*Asterisk

\\Backslash

\tTab

\nNewline

# Regular Expression (Regex) Tester

Regular expressions are patterns used to match character combinations in strings. This Regex Tester allows you to write standard JavaScript Regex patterns and test them against any text in real-time.

It supports standard flags like Global (g), Case Insensitive (i), and Multiline (m). Matches are highlighted instantly, making it perfect for debugging complex patterns.