Regex Tester

Test and debug regular expressions online. Free regex tester with match highlighting, groups, and explanation.

About Regex Tester

A regular expression (regex) is a sequence of characters that defines a search pattern. This tool helps you test and debug your regular expressions with real-time feedback and match highlighting.

Features

  • Test regex patterns against sample text
  • Support for global, case-insensitive, and multiline flags
  • Highlight all matches in the test string
  • Display capture groups and their values
  • Real-time pattern validation

Common Regex Patterns

  • Email: ^\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,3}$
  • URL: https?://[\w\-]+(\.[\w\-]+)+[/#?]?.*$
  • Phone: ^\+?[\d\s\-()]+$
  • Hex Color: ^#?([a-fA-F0-9]{6}|[a-fA-F0-9]{3})$

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