DNS record generators and zone file tools

Convert IPs/CIDRs to PTR names (in-addr.arpa / ip6.arpa) and example zone lines

Generate full reverse zone files from CIDR + hostname template

Minimal set of reverse zones needed to delegate a CIDR (v4 & v6 nibble math)

Plan PTR coverage for a block; list missing/extra PTRs against naming pattern

Bulk create A and AAAA record sets from IP lists with TTL and RRset controls

Build valid CNAME records with loop detection and self-target checks

Plan MX record priorities with fallback guidance and sample configurations

Compose SRV records with service, protocol, priority, weight, port, and target validation

Safely escape and split TXT record strings into 255-character chunks with validation

Craft SPF policies with mechanism validation, qualifier control, and DNS lookup counting

Generate DKIM RSA keypairs (1024/2048-bit) with selectors and DNS TXT records

Create DMARC policies with alignment options, reporting addresses, and failure handling

Build CAA records for certificate authority authorization with misconfiguration warnings

Create TLSA (DANE) records from certificates or hashes with usage, selector, and matching type options

Generate SSHFP records from SSH public keys or fingerprints with algorithm and fingerprint type selection

Build SVCB and HTTPS resource records with service parameters like ALPN, port, and ECH configuration

Construct NAPTR records for service discovery with order, preference, flags, service, regexp, and replacement fields

Create LOC records from coordinates and convert between latitude/longitude and DNS LOC format

Generate RP (Responsible Person) records with mailbox and TXT domain name references

Convert Unicode domain names to Punycode and back with IDNA2008 normalization support

Validate individual DNS resource record syntax (A/AAAA/CNAME/MX/TXT/SRV/CAA) with error detection

Humanize DNS TTL values and compute cache expiry times with recommendations

Estimate DNS message size and UDP fragmentation risk with EDNS buffer recommendations

Normalize domain labels with homograph attack detection and script mixing warnings

Normalize and canonicalize BIND zone files with error checking and formatting

Compare two zone files and identify added, removed, and changed DNS records

Analyze zone file structure, record distribution, and configuration health

Validate DNS names against RFC length limits: 63 bytes per label, 255 bytes per FQDN

Compute the DNSKEY key tag from a DNSKEY RR (RFC 4034 algorithm) and display it alongside key meta

Generate DS records (SHA-1/256/384) from a DNSKEY or public key, with copyable output for parent submission

Calculate NSEC3 owner hashes for a name given salt, iterations, and algorithm, showing the hashed owner FQDN

Build CDS/CDNSKEY RRs from child DNSKEYs to enable automated DS updates at the parent

Suggest RRSIG validity windows (inception/expiration) based on TTLs and desired overlap, with renewal lead-time guidance