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Most used tokens
All tokens
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Meta sequences
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Flags/Modifiers
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Most used tokens
[abc]
A single character of: a, b or c
Matches either an a, b or c character
/[abc]+/
a bb ccc
[^abc]
A character except: a, b or c
Matches any character except for an a, b or c
/[^abc]+/
Anything but abc.
[a-z]
A character in the range: a-z
Matches any characters between a and z, including a and z
/[a-z]+/
Only a-z
[^a-z]
A character not in the range: a-z
Matches any characters except one in the range a-z
/[^a-z]+/
Anything but a-z.
[a-zA-Z]
A character in the range: a-z or A-Z
Matches any characters between a-z or A-Z. You can combine as much as you please.
/[a-zA-Z]+/
abc123DEF
.
Any single character
Matches any character other than newline (or including newline with the /s flag)
/.+/
a b c
\s
Any whitespace character
Matches any space, tab or newline character.
/\s/
any whitespace character
\S
Any non-whitespace character
Matches anything other than a space, tab or newline.
/\S+/
any non-whitespace
\d
Any digit
Matches any decimal digit. Equivalent to [0-9].
/\d/
one: 1, two: 2
\D
Any non-digit
Matches anything other than a decimal digit.
/\D+/
one: 1, two: 2
\w
Any word character
Matches any letter, number or underscore.
/\w+/
any word character
\W
Any non-word character
Matches anything other than a letter, number or underscore.
/\W+/
any word character
(...)
Capture everything enclosed
Parts of the regex enclosed in parentheses may be referred to later in the expression or extracted from the results of a successful match.
/(he)+/
heheh he heh
(a|b)
Match either a or b
Matches the a or the b part of the subexpression.
a?
Zero or one of a
Matches an `a` character or nothing.
/ba?/
ba b a
a*
Zero or more of a
Matches zero or more consecutive `a` characters.
/ba*/
a ba baa aaa ba b
a+
One or more of a
Matches one or more consecutive `a` characters.
/a+/
a aa aaa aaaa bab baab
a{3}
Exactly 3 of a
Matches exactly 3 consecutive `a` characters.
/a{3}/
a aa aaa aaaa
a{3,}
3 or more of a
Matches at least 3 consecutive `a` characters.
/a{3,}/
a aa aaa aaaa aaaaaa
a{3,6}
Between 3 and 6 of a
Matches between 3 and 6 (inclusive) consecutive `a` characters.
/a{3,6}/
a aa aaa aaaa aaaaaaaaaa
^
Start of string
Matches the start of a string without consuming any characters. If multiline mode is used, this will also match immediately after a newline character.
/^\w+/
start of string
$
End of string
Matches the end of a string without consuming any characters. If multiline mode is used, this will also match immediately before a newline character.
/\w+$/
end of string
\b
A word boundary
Matches, without consuming any characters, immediately between a character matched by \w and a character not matched by \w (in either order).
/d\b/
word boundaries are odd
\B
Non-word boundary
Matches, without consuming any characters, at the position between two characters matched by \w.
/r\B/
regex is really cool

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