Match Debugger
Debug regex matches: see start index, end index, length, and matched text for each match.
Flags:
Click "Debug" to run the regex and see match positions (start, end, length).
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About this tool
Same inputs as Regex Tester (pattern, test string, flags). Results are shown in a debug table: start index, end index, length, matched text, and capture groups. Use this when you need character positions for debugging or tooling.