Regex Tester & Validator
This tool allows you to test and validate regular expressions in real-time. Enter your regex pattern and a test string to see if they match. You can also toggle flags like case-insensitive, global, and multiline to customize the behavior of your regex.
Why Use a Regex Tester?
- Instantly debug and validate complex regex patterns.
- Save time by testing your expressions before using them in code.
- Understand flag behavior like
i,g,m, ands. - Free and privacy-friendly — no data is sent to any server.
Common Use Cases
Regular expressions are powerful for pattern matching — used in validation, parsing, search-and-replace, and data cleaning. Whether you’re a frontend or backend developer, this regex tester makes it easier to experiment and learn.
Learn Regex Quickly
Not sure where to start? Try patterns like ^[a-z]+$ for lowercase validation or\d3-\d2-\d4 for numeric formats. Experiment freely and learn by doing!