Email Deliverability & DNS Records Suite
Build and validate SPF, DKIM, DMARC, BIMI, and CAA DNS records plus SSL and WHOIS diagnostics
Tools in This Collection
SSL Certificate Checker
Check SSL certificate status, validity, and protocol information for any domain.
DNS Lookup
Perform DNS lookups and view DNS records
WHOIS Lookup
Lookup domain registration information
SPF Record Builder
Build and validate SPF DNS TXT records
DMARC Record Builder
Build and validate DMARC DNS TXT records
IPv6 Expander
Expand compressed IPv6 addresses to full form and compress them back to canonical notation, with validation and a per-group breakdown.
DKIM Record Generator
Build and validate DKIM DNS TXT records from a public key
CAA Record Generator
Build and validate DNS CAA records (RFC 8659)
BIMI Record Generator
Build a BIMI DNS TXT record (v=BIMI1) from your SVG logo URL and optional Verified Mark Certificate URL, and publish it at default._bimi.yourdomain.com.
Why This Collection
We curated this collection by combining the best tools for development to match your needs.
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Last updated: October 29, 2026