Regular
Expressions
101
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Regular
Expressions
101
@regex101
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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
v1
Select Regex Version
Regex Versions
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Delimiters
/
`
"
'
Change delimiter
/
Regex Flags
g
lobal
Don't return after first match
m
ulti line
^ and $ match start/end of line
i
nsensitive
Case insensitive match
s
ingle line
Dot matches newline
stick
y
Anchor to start of pattern, or at the end of the most recent match
u
nicode
Match with full unicode
in
d
ices
The regex engine returns match indices
Set Regex Options
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Test String
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Description
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