code Free Regex Tester (High Quality)

Test regular expressions in real-time for Free.

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Free Online Regex Tester & Debugger

Regular Expressions (Regex) are powerful text-processing patterns. Our Free Regex Tester allows you to test your patterns in real-time against any text string, highlighting matches instantly with high quality precision.

Regex Cheatsheet

  • . : Any single character
  • \d : Any digit (0-9)
  • \w : Any alphanumeric character (A-Z, a-z, 0-9, _)
  • * : Zero or more repetitions
  • + : One or more repetitions
  • ? : Zero or one repetition (optional)
  • ^ : Start of string
  • $ : End of string

Flags

Flags change how the pattern behaves. The most common ones are:

  • g (global): Find all matches, not just the first one.
  • i (case insensitive): Ignore case (matches 'a' and 'A').
  • m (multiline): Treat beginning (^) and end ($) characters as working over multiple lines.
  • 100% Free & Secure: All testing happens in your browser.