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Regex Tester

Dan's Tools
Powered By RegExr
Library
{{getLabel()}}
{{getLabel()}}
{{getStaticRating()}}

                    




Substitution


{{getIcon()}}{{getLabel()}}{{getDetail()}}
Regex Tester is a tool to learn, build, & test Regular Expressions (RegEx / RegExp).
  • Results update in real-time as you type.
  • Roll over a match or expression for details.
  • Save & share expressions with others.
  • Explore the Library for help & examples.
  • Undo & Redo with {{getCtrlKey()}}-Z / Y.
  • Search for & rate Community patterns.
Character classes
. any character except newline
\w \d \s word, digit, whitespace
\W \D \S not word, digit, whitespace
[abc] any of a, b, or c
[^abc] not a, b, or c
[a-g] character between a & g
Anchors
^abc$ start / end of the string
\b word boundary
Escaped characters
\. \* \\ escaped special characters
\t \n \r tab, linefeed, carriage return
\u00A9 unicode escaped ©
Groups & Lookaround
(abc) capture group
\1 backreference to group #1
(?:abc) non-capturing group
(?=abc) positive lookahead
(?!abc) negative lookahead
Quantifiers & Alternation
a* a+ a? 0 or more, 1 or more, 0 or 1
a{5} a{2,} exactly five, two or more
a{1,3} between one & three
a+? a{2,}? match as few as possible
ab|cd match ab or cd
Regular Expression
  • flags
Test String
Substitution
Expression Flags

ignore case (i)
global (g)
multiline (m)
extended (x)
extra (X)
single line (s)
unicode (u)
Ungreedy (U)
Anchored (A)
dup subpattern names(J)

Namespace Prefix

salesforce namespace prefix for skuid

Comments


Posting GuidelinesFormatting

- Now



Top Regular Expressions

SpreadFormatter
validate our paths
Match IDs
Test Kundennummern
Vasya regex
GC TEst
mau
rtfValidation
Validate datetime
Match a bitcoin address
Checks the length of number and not starts with 0
date substitution
Match an email address
RegEx Allowing Number Only
Url
Match or Validate phone number
Match a valid hostname
match a wide range of international phone number
Match integers
Merry Christmas

Cheat Sheet

Character classes
. any character except newline
\w \d \s word, digit, whitespace
\W \D \S not word, digit, whitespace
[abc] any of a, b, or c
[^abc] not a, b, or c
[a-g] character between a & g
Anchors
^abc$ start / end of the string
\b word boundary
Escaped characters
\. \* \\ escaped special characters
\t \n \r tab, linefeed, carriage return
\u00A9 unicode escaped ©
Groups & Lookaround
(abc) capture group
\1 backreference to group #1
(?:abc) non-capturing group
(?=abc) positive lookahead
(?!abc) negative lookahead
Quantifiers & Alternation
a* a+ a? 0 or more, 1 or more, 0 or 1
a{5} a{2,} exactly five, two or more
a{1,3} between one & three
a+? a{2,}? match as few as possible
ab|cd match ab or cd

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