Free Regex Tester & Debugger Online
Test and debug regular expressions in real-time with match highlighting, capture groups, and detailed match info. Runs entirely in your browser.
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How to Use
- Enter your regular expression pattern in the pattern field (without delimiters).
- Select the flags you need: global (g), case-insensitive (i), multiline (m), or dotAll (s).
- Type or paste your test string in the text area below.
- Matches are highlighted in real-time with different colors for each match.
- View detailed match information including capture groups and indices in the table below.
- All processing happens locally in your browser -- nothing is sent to a server.
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