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Regex Tester

Test and debug regular expressions with real-time match highlighting

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Flags: gglobal icase insensitive mmultiline sdotAll
Common Patterns

Online Regex Tester

Our Regex Tester allows you to test regular expressions against sample text in real-time. See all matches highlighted, with match counts and captured groups clearly displayed. Supports all JavaScript regex flags.

Regular Expression Basics

  • \d – Matches any digit (0-9)
  • \w – Matches word characters (letters, digits, underscore)
  • \s – Matches whitespace characters
  • . – Matches any character except newline
  • ^ – Matches start of string/line
  • $ – Matches end of string/line
  • + – One or more of the preceding
  • * – Zero or more of the preceding
  • ? – Zero or one of the preceding
  • {n,m} – Between n and m repetitions