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🔍Regex Tester & Debugger

Test, debug, and evaluate Regular Expressions (RegEx) instantly in your browser.

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Hello World! This is a Regex Test.

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About Regex Tester & Debugger

A powerful online regex tester for developers. Write your regular expressions and test them against sample text in real-time. Supports JavaScript regex flavor with global, case-insensitive, and multiline flags.

Features

  • Real-time syntax highlighting
  • Test regex against live text
  • Support for multiple flags (g, i, m)
  • Display all matches and capture groups
  • 100% client-side privacy

Frequently Asked Questions

What regex flavor does this use?
This tool uses the standard JavaScript (ECMAScript) regular expression engine directly in your browser.
Can I test multiple lines?
Yes, just enable the multiline (m) flag in the interface to match patterns across multiple lines.