RegExLib.com - The first Regular Expression Library on the Web!

Please support RegExLib Sponsors

Test Your Regular Expressions

New Silverlight Tester

Singleline

Case Insensitive

Multiline

Ignore Whitespace in Expression

Explicit Capture

URL

File

Source

Regular Expression
^(?=.*\W)(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{6,20}$