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Regex Tester

Test and debug regular expressions with multiple flags.

Developer Utilities
Regular Expression
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✨ AI Generate (Cloudflare Workers AI)
Test Text
Common Templates

What is Regex Tester?

Regular expressions (regex) are patterns used for matching text. The regex tester helps you write, test, and debug regular expressions with real-time feedback.

Features

  • Real-time Matching: See matches as you type
  • Flags Support: g (global), i (case-insensitive), m (multiline)
  • Match Highlighting: Visually see matched text
  • Group Capture: View captured groups

Common Patterns

  • Email: /^[\w.-]+@[\w.-]+\.\w+$/
  • URL: /https?:\/\/[\w.-]+/
  • Phone: /\d{3}-\d{4}-\d{4}/