Regular Expression Library

Test Your Regular Expressions

New Silverlight Tester

Singleline

Case Insensitive

Multiline

Ignore Whitespace in Expression

Explicit Capture

URL

File

Source

Regular Expression
(?!^([0-9]+)([[\\s]*]?)$)(?!^([0-9]+)[[a-zA-Z]*]?([[\\s]*]?)$)^([_]?([a-zA-Z0-9]+)([[\\s]*]?))$