Regex Tester

1. Enter a regex pattern in the Pattern field.
2. Select the regex flags you want to apply (for example g for global matches).
3. Paste or type the text to test in Input Text.
4. Optionally provide a Replacement value to preview replacements.
5. Click Run Regex to view:
   • Highlighted matches in the input text.
   • Match list with index positions and capture groups.
   • Replacement preview output.

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Regex Flags

• g (global): finds all matches, not just the first.
• i (ignore case): matches letters regardless of uppercase/lowercase.
• m (multiline): makes ^ and $ work per line.
• s (dotAll): allows . to match newlines.
• u (unicode): enables Unicode-aware matching behavior.
• y (sticky): next match must begin exactly where the previous one ended.

Note: Matching behavior follows JavaScript regular expression syntax.