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Regex Tester & Debugger

Write, test, and debug your Regular Expressions. Matches are highlighted in real-time as you type, with detailed breakdowns of capture groups.

Valid Pattern

g: globali: case insensitivem: multilines: dotAll

Test String

Match Result (2)

#	Match	Index	Groups
1	support@example.com	14	-
2	sales@company.co.uk	37	-

Which Regex engine is used?

This tool uses your browser's native JavaScript Regular Expression engine.

What flags are supported?

Standard JavaScript flags: g (global), i (case insensitive), m (multiline), s (dotAll), u (unicode), y (sticky).

Is it secure?

Yes, all regex processing happens strictly in your browser. We never send your patterns or test strings to any server.