Domain name regex pattern
Copy and test a JavaScript regex for domain names, with examples and a one-click link to the regex tester.
Domain name regex pattern
Validate whole value
Use anchors to check whether the complete value matches.
Regex: ^(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)+[a-z]{2,63}$
Flags: i
Search in text
Find matching fragments inside a larger block of text.
Regex: \b(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)+[a-z]{2,63}\b
Flags: gi
Examples that match
example.comsub.domain.co.uk
Examples that do not match
-example.comlocalhost
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