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RegEx Tester & Debugger

Test and debug regular expressions in real-time. See matches highlighted with detailed explanations.

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About RegEx Tester

Test your regular expressions against sample text with instant highlighting of matches. Supports JavaScript regex syntax with flags. See match groups, indices, and debug complex patterns easily.

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Key Features

  • ✓100% client-side processing - your data never leaves your browser
  • ✓No sign-up or registration required - completely free
  • ✓Instant results with no waiting or processing delays
  • ✓Works on desktop, tablet, and mobile devices
  • ✓Privacy-focused - no tracking, no data collection