Test Regular Expressions Instantly
Regular expressions (regex) are powerful pattern-matching tools used in every programming language for searching, validating, and transforming text. Writing regex from scratch is error-prone, and testing it against real data before use is essential. This tester shows all matches highlighted in the test string as you type, making it easy to iterate on your pattern.
Toggle flags like case-insensitive (i), global match (g), and multiline (m) to refine your pattern's behavior. Common use cases include email validation, extracting data from logs, replacing text, and parsing structured strings. All matching runs locally in your browser with zero latency.