Domain Name Validator
Validate domain names, subdomains, and DNS formats
Domain Name Input
Enter a domain name to validate
About Domain Name Validation
This tool validates domain names according to RFC standards and common DNS practices.
- Labels: Each part separated by dots (max 63 chars each)
- Total Length: Maximum 253 characters
- Characters: Letters, numbers, hyphens (not at start/end of labels)
- International: Punycode (xn--) for non-ASCII characters
- Wildcards: Only allowed as first label (*)
- FQDN: Fully Qualified Domain Names end with a dot