Use this Regex for server-side validation also with some slight modifications like so for .NET -- @\w+([-+.']\w+)@\w+([-.]\w+)\.[a-zA-Z0-9]{2,6}(-.{2,6})*;

validates strings in time format HH:mm with hour in 24h format. only accepts up to 23:59

This regex replace the second tag content which has the prefix ":". If you want to replace the third, just increase the statement {1} to {2}, and so go on.

Break a URL into parts: protocol url path get parameters hash

trim leading and trailing whitespace from a string

Can grab all kinds of valid twitch URLs.

Matches all valid, current UK Postcodes, including Girobank and non-geographic postcodes, irrespective of whether they contain a space. It does not include overseas territories. Adapted from the BS7666 postcode rules at http://www.cabinetoffice.gov.uk/govtalk/schemasstandards/e-gif/datastandards/add...

Select a character (or string) ingnoring if that element is inside the HTML tags. Useful to apply html tags using replace.

IOS3166 Country Code Identification REGEX

Regular expression for password validation Rules: 8-120 chars no spaces must contain at least one a-z char must contain at least one A-Z char...

Matches all valid IP addresses from 0.0.0.0 to 255.255.255.255

The way I like it formatted