Regex Tester

Use this tool

How to use Regex Tester

• Enter the pattern you want to test, then add flags such as `g`, `i`, or `m` if the search needs them.
• Paste realistic sample text rather than only the perfect example, so the matches reflect real input.
• Review both the match count and the individual results before trusting the expression in code or content cleanup work.

Example workflow

Before adding a validation pattern to a signup form, a developer can test it against valid and invalid addresses here and see exactly which examples are overmatching.