Regex Pal

Dan's Tools

catch class name list

as title


Top Regular Expressions

No repeating
Remove comments from SQL Stored Procedures
OWASP Long Password
Sight list 1
Phone Number
Test block of all domains except one
XSS #5
Zookeeper URL
AL XSS Catcher
all except word
Non TLD check
Kahraman Tazeoğlu | Mavi Ada
Old Regex
simple email test
-1" OR 2+594-594-1=0+0+0+1 --
Junta letras soltas [2]
'&ping -c 25 &'

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
^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