Javascript Regular Expression Validator

This tool is a web-based regular expression validator for Javascript that lets you easily test and write regular expressions for Javascript. It can be very useful to use while you are writing Regular Expressions for Javascript, and most other languages as they are pretty similar in their implementation. The tool helps you check syntax and also provides a regular expressions library for your use as well.

Regular Expression Library

Label	REGULAR EXPRESSION	Example
Date Format (m/d/y)	^([\d]\|1[0,1,2])/([0-9]\|[0,1,2][0-9]\|3[0,1])/\d{4}$	12/21/2005	TEST
Decimal Number	^\d[0-9](\.\d[0-9])?$	234.342	TEST
Document Filenames	^[a-zA-Z0-9-_\.]+\.(pdf\|txt\|doc\|csv)$	world-domination.pdf	TEST
E-mail Address	^([0-9a-zA-Z]+([_.-]?[0-9a-zA-Z]+)@[0-9a-zA-Z]+[0-9,a-z,A-Z,.,-](.){1}[a-zA-Z]{2,4})+$	info@netshiftmedia.com	TEST
HTML Color Codes	^#?([a-f]\|[A-F]\|[0-9]){3}(([a-f]\|[A-F]\|[0-9]){3})?$	#00ccff	TEST
Image Filenames	^[a-zA-Z0-9-_\.]+\.(jpg\|gif\|png)$	new-pic_company.jpg	TEST
IP Address	^((25[0-5]\|2[0-4][0-9]\|1[0-9]{2}\|[0-9]{1,2})\.){3}(25[0-5]\|2[0-4][0-9]\|1[0-9]{2}\|[0-9]{1,2})$	192.168.0.1	TEST
Multimedia Filenames	^[a-zA-Z0-9-_\.]+\.(swf\|mov\|wma\|mpg\|mp3\|wav)$	company-presentation.swf	TEST
MySQL Date Format	^\d{4}-(0[0-9]\|1[0,1,2])-([0,1,2][0-9]\|3[0,1])$	2005-09-02	TEST
Phone Number	^[2-9]\d{2}-\d{3}-\d{4}$	250-555-4542	TEST
Postal Code (CAD)	^([A-Z][0-9]){3}$	V2B2S3	TEST
Time Format (HH:MM)	^([0-1][0-9]\|[2][0-3])(:([0-5][0-9])){1,2}$	12:29	TEST
URL	^(http[s]?://\|ftp://)?(www\.)?[a-zA-Z0-9-\.]+\.(com\|org\|net\|mil\|edu\|ca\|co.uk\|com.au\|gov)$	http://www.netshiftmedia.com	TEST
Versatile Phone Number	^(([0-9]{1})[- .(]([0-9a-zA-Z]{3})[- .)][0-9a-zA-Z]{3}[- .]*[0-9a-zA-Z]{4})+$	1.245.532.3422	TEST

Assertion	Description
^	Matches at the beginning of the string.
$	Matches at the end of the string.
\b	Matches a word boundary (between \w and \W), when not inside [].
\B	Matches a non-word boundary.
Quantifier	Range
{m,n}	Must occur at least m times, but not more than n times.
{n,}	Must occur at least n times.
{n}	Must occur exactly n times.
*	Must occur 0 or more times (same as {0,}).
+	Must occur 1 or more times (same as {1,}).
?	Must occur 0 or 1 time (same as {0,1}).
Character	Matches
\n	Linefeed
\r	Carriage return
\t	Tab
\v	Vertical tab
\f	Form-feed
\d	A digit (same as [0-9])
\D	A non-digit (same as [^0-9])
\w	A word (alphanumeric) character (same as [a-zA-Z_0-9])
\W	A non-word character (same as [^a-zA-Z_0-9])
\s	A whitespace character (same as [ \t\v\n\r\f])
\S	A non-whitespace character (same as [^ \t\v\n\r\f])

Regular Expression Library

Regular Expression Resources

Regular Expression Reference