About DNS Zone-File Validator

Performs a bounded, browser-local structural review of common BIND-style DNS zone records. It recognizes frequently used record types, directives, parenthesized SOA records, and several contradictions while clearly remaining a static preflight rather than a replacement for named-checkzone or a live authoritative server.

  • Supports common A, AAAA, CAA, CNAME, DNSKEY, DS, MX, NAPTR, NS, PTR, SOA, SRV, TLSA, and TXT record shapes.
  • Flags missing or multiple SOA records, CNAME owner conflicts, malformed A/MX/SRV data, and unsupported directives.
  • Does not expand $INCLUDE, execute $GENERATE, validate delegation, or query DNS.

Frequently Asked Questions

Is this equivalent to named-checkzone?
No. It is a fast browser-local structural preflight. Use the DNS server implementation that will load the zone for authoritative validation.
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