Regex Tester
Interactive regular expression testing with real-time match highlighting.
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Test String
Result (Match Highlighting)
0 matches
Frequently Asked Questions about Regex Tester
What are regular expressions (Regex)?
Regular expressions are a sequence of characters that specifies a search pattern. They are highly useful for extracting information from text, such as validating emails, formatting phone numbers, or parsing dates.
Which Regex engine is used?
This tool uses the JavaScript (ECMAScript) regular expression engine, which runs directly in your web browser.
Is my test string sent to a server?
No. All processing and testing are done completely client-side. Your data is strictly confidential and never leaves your device.