Regular Expressions Testing Tool

by Brian DeMarzo, April 11, 2001

Want to test a regular expression? Type the regular expression pattern (without the beginning and ending forward slashes), choose the pattern checking modifiers (global and ignore-case), type the string you want to check your regular expression against, and click the Search button for the results!

Regular Expression Pattern:
Search string:
Ref: Marzie's ToolBox

Interpretation of Special Character Strings

^Match the expression at the beginning of the line
$Match the expression at the end of the line
\Escape the special meaning of the next character
-Indicates a range when not in the first/last position. When specifying a range with the "[" and "]", to specify a list.
|Union of regular expressions
[LIST]Match a Single Character specified in the list.
[^LIST]Don't match a single character specified in the list.
.Match any single character (including non-printable ones).
*Repeat the previous regular expression 0 or more times.
+Repeat the previous regular expression 1 or more times.
?Repeat the previous regular expression 0 or 1 times.
()Groups regular expression.
Ref: Regular Expressions         Additional Documentation

Useful regular expressions

Email x@x.xx/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$/
Date yyyy-mm-dd/^\d{2,4}(\/|-|.)(0?\d|[01][012])(\/|-|.)(0?\d|[012]\d|[3][01])$/
HTML Tags(1)/<TagName[^>]*>/
HTML Tags(2)/<TagName[^>]*>.*</TagName>/
IMG To Text/<img src=\".*\" alt=\"(.*)\">/i (NOTE: Doesn't work)