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DomainDoctor
DomainDoctor analyzes domains and presents technical intelligence for DNS, SSL, WHOIS, security, performance, mail, infrastructure, and reputation.
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91 % |
|
Developer tools for the parts of the internet that break: DNS, SSL, HTTP & email | Kirk Diamond
Free DNS, SSL/TLS, HTTP and email checks from a real server. Domain health grades, SPF/DKIM/DMARC, cert chains. Curl-friendly, no sign-up, nothing stored.
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91 % |
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digrlabs — DNS, HTTP, email & domain diagnostics
digrlabs is the home of dnsdigr, httpdigr, emaildigr, and domaindigr — a family of focused diagnostic tools for everything your domain does.
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91 % |
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CrowWake — DNS, email auth, security & performance watch
CrowWake watches SPF, DKIM, DMARC, SSL, security headers and performance — and crows when something breaks. First domain free.
|
90 % |
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ThreatKestrel — Free DNS, Email & Cybersecurity Tools
Free cybersecurity tools: DNS lookup, DMARC/SPF/DKIM checker, SSL certificate analyzer, IP geolocation, blacklist check, and 50+ more. No signup required.
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90 % |
|
ServerRecords — Free DNS, Email & Network Diagnostics
Simple DNS, email authentication, blacklist and WHOIS look ups with plain explanations.
|
89 % |
|
dnsfyi — Instant DNS Lookup, Domain Health & Email Security Audit
Instantly check DNS records (A, MX, TXT, NS), SSL certificates, SPF/DKIM/DMARC email security, blacklists & open ports. Free domain intelligence tool.
|
89 % |
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UtilUp
Free online tools for everyone: text, time, web, DNS, JSON, PDF, encoders and converters, all in one fast, easy-to-use toolbox.
|
89 % |
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SecRift - Domain security scanner with prioritized, actionable findings
Scan any domain’s email and DNS security - SPF, DMARC, MTA-STS, DANE, and DNSSEC, scanned in seconds.
|
89 % |
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DNSDeets | free domain security scanner
Check SPF, DKIM, DMARC, DNS, TLS and security headers in one scan. Explainable 0–100 score, plain-English fixes, free API.
|
89 % |
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Domain Health Monitoring — Know before your customers do.
Free instant checks for SSL, blacklists, SPF/DKIM/DMARC, domain expiry and DNS. Monitor one domain free; alerts from $5/mo.
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89 % |
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MailPeek — Free Email Security & Privacy Tools Online
Free email security tools: analyze headers, check domain health (SPF, DKIM, DMARC), detect phishing, scan breaches, and create disposable temporary email inb...
|
88 % |
|
Toolsfornet — Developer Tools for the Internet
Toolsfornet is a collection of sharp developer tools. DNS lookup, IP detection, timezone conversion and more — built for people who know what they're doing.
|
88 % |
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DotDeeper - Free Domain, DNS & SSL Monitoring
Free domain monitoring for DNS, nameservers, SSL certificates, and SPF/DKIM/DMARC email auth. Instant alerts the moment something changes.
|
88 % |
|
lookup lad
Read every public record a domain publishes — DNS, DNSSEC, mail policy, TLS and attack surface.
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88 % |
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DomainDiff - Monitor Your Domain Changes
Get alerts when your domain DNS records change, SSL certificates expire, WHOIS records change, and website content changes.
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88 % |
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IntoDNS.AI — DNS & Mail Server Checker (SPF, DKIM, DMARC, DNSSEC)
Check DNS and mail server health in one report: SPF, DKIM, DMARC, DNSSEC, MTA-STS, BIMI, blacklists. Free, no signup. Not affiliated with intodns.com.
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88 % |
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TestMyDomainFred — Free Domain Health & Email Tools
Check DNS propagation, SPF, DKIM, DMARC, SSL, blacklists, WHOIS and more. Free domain health tools powered by Fred.
|
88 % |
|
DomainCat — SSL & Domain Expiry Monitoring
Monitor SSL certificates (including the origin cert behind Cloudflare), domain expiry dates, DNS records, WHOIS data, and email security for all your domains...
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88 % |
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Domain Intelligence API: WHOIS, DNS, SSL, Subdomains, Email
Free WHOIS API, DNS lookup, SSL inspection, subdomain enumeration & email security (SPF/DMARC/DKIM) in one call. 1,000 requests/mo free — no credit card.
|
88 % |
Detected social media networks