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regular_expression
Regex Tester
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Regular Expression
/
/
g
i
m
s
Test String
Matches (
0
)
Capture Groups
Replace
Replacement
Result
Regex Cheatsheet
Character Classes
.
any character
\d
digit [0-9]
\w
word [A-Za-z0-9_]
\s
whitespace
Quantifiers
*
0 or more
+
1 or more
?
0 or 1
{3}
exactly 3
{3,5}
3 to 5
Anchors
^
start of string
$
end of string
\b
word boundary
Groups
(abc)
capture group
(?:abc)
non-capturing
a|b
alternation
Common Patterns
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