.*

Regex Tester

Test and debug regular expressions with real-time highlighting.

Regular Expression

/ / g

Results

Highlighted Matches

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Match Details

Enter a regular expression to see match details

Regular Expression Reference

Character Classes

\dAny digit (0-9)
\wAny word character (a-z, A-Z, 0-9, _)
\sAny whitespace character
[abc]Any character in the set
[^abc]Any character not in the set
[a-z]Any character in the range

Quantifiers

*0 or more times
+1 or more times
?0 or 1 time
Curly BracesUse { x } for exactly x repetitions
Curly BracesUse { x, } for x or more repetitions
Curly BracesUse { x,y } for between x and y repetitions

Anchors & Assertions

^Start of string/line
$End of string/line
\bWord boundary
(?=pattern)Positive lookahead
(?!pattern)Negative lookahead
(?<=pattern)Positive lookbehind

Flag Descriptions

g (global)

Find all matches rather than stopping after the first match

i (case insensitive)

Ignore case when matching

m (multiline)

^ and $ match start/end of line, not just start/end of string

s (dotAll)

. matches newline characters as well

u (unicode)

Treat pattern as a sequence of unicode code points

y (sticky)

Matches only from the index indicated by lastIndex property

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