Text and data tools
Regex Tester
Test JavaScript regular expressions, inspect matches and capture groups, and preview replacements.
Test Text
Matches
Run a test to inspect matches.
Replacement Preview
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Test JavaScript regular expressions against real input
This regex tester runs JavaScript regular expressions against sample text, showing matches, capture groups, flags, and replacement previews. Use it to tune validation rules, parsers, find-and-replace patterns, and log filters.
Because the tool uses browser JavaScript behavior, it is a quick way to verify the same regex syntax used in many frontend and Node.js workflows.