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Regex Tester
Test and debug regular expressions with live match highlighting
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Hello World! hello regex tester.
About this tool
A free online regular expression tester with real-time match highlighting. Enter your regex pattern and test string to instantly see all matches highlighted in the text. Supports global (g), case-insensitive (i), multiline (m), and dotall (s) flags. Great for debugging regex in JavaScript, Python, and other languages.