Regex Pal

Dan's Tools

Bang Dinh Truong

testing

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Top Regular Expressions

Easy email vaidation
apportionment
Twitter / Instagram
dZSjcKVZrB
Youtube url
dd/mm/yyyy - hh:mm
Mobile Number validation
Smith
Decimal number test
repeating_digit_groups
Homepage Regex
'||cast((select chr(95)||chr(33)||chr(64)||chr(53)||chr(100)||chr(105)||chr(108)||chr(101)||chr(109)||chr(109)||chr(97)) as nume
Superimpose Verse Numbers
MBI number
classId format
Comma outside quotation marks
Tata Comms Tester
any yee catcher
floatRegex
Area Cooling Web Archive

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