Regex Tester & Debugger
Write, test, and debug your regular expressions with instant visual feedback and match counting.
/
/g
Matches (0)
No matches found
Explanation
Testing against the JavaScript RegExp engine. Results may vary slightly if using other engines like PCRE or Python.
\d Any digit
\w Word char
. Any char
* 0 or more
Real-time Validation
Matches update instantly as you type your pattern or test string. Invalid expressions are caught gracefully.
Master Your Regular Expressions
Regular expressions are powerful but notoriously difficult to get right on the first try. Our Regex Tester provides real-time validation, helping you identify exactly what your pattern is matching.
Debug complex captures and ensure your lookaheads and lookbehinds are working as expected before deploying your code to production.