Regular
Expressions
101
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Regular
Expressions
101
@regex101
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Function
Match
Substitution
List
Unit Tests (7)
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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
r"
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
e
x
tended
Ignore whitespace
s
ingle line
Dot matches newline
u
nicode
Match with full unicode
a
scii
Make escape sequences perform ASCII-only matching
Set Regex Options
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Test String
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Description
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