regex101

regex101 provides an interactive environment for testing regular expressions. Visitors can select a supported expression flavour, enter sample text and inspect matches or explanations. The website is useful for debugging a pattern before using it in code. Runtime differences and input edge cases remain relevant, so the final expression should also be checked in its target environment.

It is useful for investigating a particular design or software-development task. Its focus includes Regular expression testing, Match explanations and Pattern debugging, helping a visitor identify the relevant product, technical resource or asset and relate it to the work being undertaken.