Regular
Expressions
101
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Regular
Expressions
101
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All your environment variables, in one place
Explanation
An explanation of your regex will be automatically generated as you type.
Match Information
Detailed match information will be displayed here automatically.
Quick Reference
Regular Expression
No Match
v2
Select Regex Version
Regex Versions
/
Delimiters
/
~
@
;
%
`
#
Change delimiter
/
mg
Regex Flags
g
lobal
Don't return after first match
m
ulti line
^ and $ match start/end of line
i
nsensitive
Case insensitive match
e
x
tended
Ignore whitespace
e
X
tra
Disallow meaningless escapes
s
ingle line
Dot matches newline
u
nicode
Match with full unicode
U
ngreedy
Make quantifiers lazy
A
nchored
Anchor to start of pattern, or at the end of the most recent match
J
changed
Allow duplicate subpattern names
D
ollar end only
$ matches only end of pattern
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