🔍 Regex Tester
Test regular expressions with real-time highlighting and capture groups.
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Quick Reference
.Any character (except newline)
\dDigit [0-9]
\wWord char [A-Za-z0-9_]
\sWhitespace
^Start of string/line
$End of string/line
*0 or more
+1 or more
?0 or 1
{n,m}Between n and m times
[abc]Character class
(abc)Capture group
(?:abc)Non-capturing group
a|bAlternation (a or b)
(?=abc)Positive lookahead
(?!abc)Negative lookahead
Free Regex Tester
Test and debug regular expressions in real-time. See matches highlighted, view capture groups, and use our built-in quick reference. Supports all JavaScript regex flags including global, case-insensitive, multiline, dotAll, and unicode. All processing happens in your browser — your data never leaves your device.