DNS, WHOIS, SSL, and email diagnostics — explained in plain English.
Paste a domain, IP address, or email.
Look up DNS records for any domain. A, AAAA, CNAME, MX, TXT, NS, and SOA records with plain-English explanations.
Look up WHOIS and RDAP registration data for any domain. Registrar, creation date, expiration, and status.
Check SSL/TLS certificates for any domain. Validity, expiration, issuer, SANs, and protocol.
Look up MX records to see where a domain's email is delivered. Identifies email providers.
Check if a domain has a valid SPF record. Validates syntax and explains the policy.
Check if a domain has a DMARC policy. Validates the record, explains the policy, flags issues.
9 tools · DNS lookup, WHOIS, nameserver checks, propagation, DNSSEC, and more. F…
8 tools · Check MX records, SPF, DKIM, DMARC, BIMI, SMTP, and email headers. Fre…
20 tools · IP lookup, geolocation, WHOIS, blacklist check, IPv6 tools, subnet cal…
4 tools · SSL certificate checker, password generator, strength tester, and encr…
4 tools · Port scanner, MAC address lookup, ASN lookup, and network diagnostic t…
12 tools · HTTP headers, JSON formatter, hash generators, binary converters, and …
4 tools · Color conversion tools — RGB, HEX, CMYK, and HSV to Pantone converters…
5 tools · Link analyzer, user agent checker, SERP simulator, robots.txt generato…
15 tools · QR codes, text tools, calculators, encoders, and everyday utilities.…