Your Domain Analysis Toolkit
Free SSL & DNS checking tools for developers, sysadmins, and security professionals
Enter a domain and choose what to check
SSL Certificate Checker
Comprehensive SSL/TLS certificate analysis. Check certificate validity, expiration dates, certificate chain, cipher suites, and security configurations.
DNS Health Checker
Complete DNS health analysis for your domains. Check nameservers, MX records, SOA configuration, SPF/DKIM/DMARC, and get a comprehensive health score.
WHOIS/RDAP Lookup
Modern WHOIS and RDAP lookup tool. Check domain registration data, registrar info, expiration dates, nameservers, IP location, and ASN details.
Professional-grade domain analysis tools, completely free and open source
Get instant results with our optimized infrastructure. No waiting, no delays.
No subscriptions, no limits, no hidden fees. Use as much as you need.
RESTful APIs for all tools. Integrate into your monitoring systems easily.
Monitor SSL expiry and DNS health
Audit certificate configurations
Troubleshoot DNS issues
Integrate with APIs
Built with care by Asim Zeeshan