Regex Tester
NewTest and debug regular expressions with live match highlighting.
A regex tester helps developers verify regular expressions before shipping them into production code. It makes debugging easier by showing how a pattern behaves with real sample text and selected flags.
This tool lets you enter a pattern, toggle common regex flags, and run matches against any input text. It reports total match count, start indexes, and captured groups so you can inspect pattern behavior line by line.
Compilation and matching run in your browser using native JavaScript RegExp support, with clear feedback for invalid patterns.
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