Run DNS, MX, SPF, DMARC, DKIM, SSL, WHOIS, blacklist and network diagnostics in one premium toolkit built for engineers.
The checks engineers reach for every day.
Query any DNS record type for a domain.
List mail exchangers and their priorities.
Resolve an IP address back to a hostname.
Fetch and parse a domain's SPF record.
Read and interpret a DMARC policy.
Score mail-server configuration and reachability.
Geolocation, ASN and network owner for an IP.
Validate a site's certificate and chain.
Registration, registrar and nameserver details.
Test an IP or domain against DNSBLs.
Aggregate DNS, email and SSL into one score.
Inspect response headers for a URL.
Compute MD5, SHA-1 and SHA-256 digests.
Compute network, broadcast and host ranges.
Resolve and audit every DNS record type.
SPF, DKIM, DMARC, SMTP and mail-flow diagnostics.
Ping, ports, reverse DNS, ASN and IP intelligence.
Certificate, chain and HTTPS validation.
WHOIS, age, blacklist and reputation checks.
Headers, availability and security posture.
Encoders, hashing, calculators and converters.
Every check queries authoritative sources in real time — no cached guesses.
Results come with severity indicators and concrete remediation steps, not just raw records.
Client-side utilities never leave your browser; server checks are rate-limited and never sold.
A modern Next.js stack tuned for Core Web Vitals and accessibility.
“The mail-flow and DMARC breakdown saved me an afternoon of manual digging.”
“Clean API endpoints meant I wired these checks straight into our monitoring.”
“Finally a diagnostics suite that looks as good as it works. Clients love the reports.”
A unified platform for DNS, email deliverability, SSL, WHOIS, network and web diagnostics — designed for engineers who need answers fast.
No. There is no account system and no signup — every tool works instantly without one. The only history is the handful of recent inputs kept in your own browser, which you can replay from the tool page.
Yes. Server-side tools query real resolvers, mail servers and certificate endpoints; browser utilities compute locally.
Every server-side tool exposes a JSON endpoint at /api/tools/{slug}. See any tool page for a ready-to-run cURL example.
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