Regex Tester
Developer Tools
Regex Tester
Test, debug, and learn regular expressions instantly in your browser. Features live match highlighting, group extraction, and substitution preview without sending data to our servers.
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Real-time Testing
Quick Tip
Hover over the flags (like g for Global or i for Case Insensitive) to see what they do. You can use $1 or $2 in the Substitution field to reference capture groups.
