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Regex Tester
Test JavaScript regular expressions with live match highlighting, group inspection, and replace preview.
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Presets:
//gi
Preview — 3 matches
Send email to hi@pdfhub.space or Support@Example.COM for help.
Also try admin@site.io
Also try admin@site.io
Match details (3)
#1 @ index 14: hi@pdfhub.space
#2 @ index 33: Support@Example.COM
#3 @ index 72: admin@site.io
Uses
$1, $2… for capture groups.Send email to [EMAIL] or [EMAIL] for help.
Also try [EMAIL]
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Debug regex in real time
Every keystroke re-runs your pattern against the test string and highlights matches. Toggle flags (global, case-insensitive, multiline, dotall, unicode, sticky), inspect capture groups per match, and preview a bulk replacement — all locally in your browser using the native JavaScript RegExp engine.
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