Regex Tester & Debugger
Write, test, and debug your regular expressions with instant visual feedback and match counting.
Matches (0)
No matches found
Explanation
Testing against the JavaScript RegExp engine. Results may vary slightly if using other engines like PCRE or Python.
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.
Real-Time
Matches update instantly as you type, giving you immediate feedback on your pattern changes.
Standard Flags
Support for Global (g), Case Insensitive (i), Multiline (m), and other standard JavaScript regex flags.
Capture Groups
See exactly which parts of the string are being captured by your parentheses groups.
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