Look up A DNS records for any domain and verify IPv4 address mapping with TTL values. Instantly check DNS A record propagation and IP assignments.
Look up AAAA DNS records for any domain and verify IPv6 address mapping with TTL values - free, browser-based, no data stored.
Check BIMI DNS records and parse logo and authority directives to validate brand indicator setup for email clients - free to use.
Check a domain's CAA DNS records to see which certificate authorities can issue SSL certificates - free tool, no account required.
Check CNAME DNS alias records for subdomains and verify canonical host targets. Useful for debugging CDN, custom domains, and subdomain redirects.
Check DKIM TXT records by selector and domain to verify email signing configuration and public key tags - no signup required.
Check and parse the DMARC DNS TXT record for any domain to verify email authentication policy, alignment settings, and reporting addresses.
Create DMARC TXT records with rua/ruf reports, alignment modes, pct rollout, and reject or quarantine policies - free, browser-based.
Look up DNS records for any domain. Query A, AAAA, CNAME, MX, NS, TXT, and SOA records instantly using Google Public DNS. Essential for domain troubleshooting.
Check DNS propagation across global resolvers for A, AAAA, CNAME, MX, NS, and TXT records to confirm your DNS changes have spread.
Query DNSKEY records for any domain and inspect DNSSEC public key metadata including flags, protocol, and algorithm - runs in your browser.
Check a domain's registration date, estimated age, registrar, expiration timeline, and nameserver details with a quick RDAP lookup.
Parse raw email headers to trace routing path, verify SPF and DKIM authentication, detect delays, and debug email delivery issues.
Check if an IP address is listed on 15+ major DNSBL spam blacklists including Spamhaus, SpamCop, and Barracuda. Instantly audit email server reputation and identify deliverability issues.
Validate MTA-STS TXT records for any domain and review policy ID metadata for SMTP transport security - browser-based, no install needed.
Look up MX DNS records for any domain to see which mail servers handle incoming email and their priority - free, no signup needed.
Look up authoritative NS records for any domain and verify nameserver delegation with TTL details in one fast DNS query.
Free online stopwatch with lap tracking, split times, and millisecond precision. Start, stop, reset, and record laps instantly in your browser.
Perform a reverse DNS PTR lookup for any IPv4 or IPv6 address to find its mapped hostname. Useful for server audits, email deliverability, and IP reputation checks.
Check SOA DNS records for any domain and inspect serial, refresh, retry, expire, and minimum TTL - instant results, no install required.
Validate SPF DNS records for any domain and review include chains, mechanisms, and all-policy qualifiers to debug deliverability issues.
Generate SPF TXT records with ip4, ip6, A, MX, and include mechanisms. Choose hard or soft fail policy - no signup required.
Look up SRV DNS records and inspect priority, weight, port, and target host values for service routing validation - no signup needed.
Check TLS-RPT DNS records and inspect report destination URIs to monitor SMTP TLS delivery failures - free tool, no signup required.
Convert TypeScript interfaces and type aliases to Zod validation schemas automatically. Supports optional fields, union types, arrays, nested objects, enums, Record, and generic types.
Check if a website is down for everyone or just you. Test website availability, status code, DNS resolution, and response time from an independent server.
Look up domain registration details including registrar, creation date, expiry date, nameservers, and status flags for any public domain.