DigInterface is a free toolkit designed for system administrators, email professionals, and domain owners who need to quickly test, analyze, and troubleshoot DNS and email infrastructure. All tools are free and most require no registration.

Our Tools

• DNS Lookup — Query A, AAAA, MX, NS, TXT, SPF, DKIM, DMARC, CNAME, SOA, PTR, SRV and CAA records using Google, Cloudflare, OpenDNS or Quad9 resolvers.
• Blacklist Checker — Check if your IP or domain is listed on 15+ major DNSBL/RBL blacklists including Spamhaus ZEN, Barracuda, Spamcop and SORBS.
• WHOIS Lookup — Retrieve registration details for any domain, or ASN/network ownership info for any IP address using RDAP.
• SSL Checker — Inspect certificate expiry, issuer, SANs, chain validity and TLS version for any domain.
• DNS Propagation — Check how a DNS change has propagated across 20 global public resolvers.
• Deliverability Tester — Run a full email health check including SPF, DKIM, DMARC, PTR, blacklists and MTA-STS.
• Email Header Analyzer — Parse raw email headers to check authentication results and trace relay hops.
• SPF Macro Tester — Debug and expand SPF macros to verify SPF record behaviour for any sender scenario.
• Base64 Tool — Encode/decode Base64, URL encode/decode, convert files and decode JWTs.
• Subnet Calculator — Calculate CIDR ranges, host counts, subnet breakdowns and binary visualisation.
• Regex Tester — Test regular expressions in Python, PCRE or ECMAScript with live highlighting.
• HAR & JSON Viewer — View HAR files with waterfall charts and explore JSON with a collapsible tree.
• Timestamp Converter — Convert Unix/Epoch timestamps to and from human-readable dates in any timezone.
• HTML Editor — Live preview HTML editor with syntax highlighting and 13 built-in snippets.
• SMTP Send Tool — Send test emails through any SMTP server with full authentication and verbose logging.

Feedback & Contact

Got feedback, questions, or want to suggest a feature? Use our contact form or email us at info@diginterface.com.

Disclaimer

This service is provided as-is, with no guarantees of uptime or data accuracy. Please verify results before taking critical action.