Regex Tester & Validator
Test, validate and match regular expressions
Test, validate and match regular expressions
Matches variations of 'PO Box' and 'Post Office' spellings, including abbreviations like 'P.O. Box', 'p o box', 'Post Office Box', and even zero-substituted forms like 'P0 Box'. Word separators can be spaces or periods, and matching is case-insensitive. Commonly used in address validation to detect PO Box addresses, such as blocking PO Box shipping destinations on e-commerce checkout forms.