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Free tools for domains and websites
Choose a check for domain registration and DNS, website technologies, page speed or an SSL certificate. Each tool has its own report and explains what its findings mean.
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Registration options
Domain Search
Check an exact domain or compare a name across popular extensions. Review registrar availability, registration terms and supplied renewal prices.
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Registration & DNS
Domain Checker
Look up published registration details and DNS records, and see whether the website responded. Review the signals behind PeerPeek's domain scores.
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Platforms & services
Technology Checker
Explore clues about the platforms and services a website may use. Review matches by category and see available version details.
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Page speed & visitor experience
Performance Checker
Test how one page loads, or see available Core Web Vitals from visits across a website. Choose mobile or desktop.
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Certificate & trust
SSL Checker
Check certificate validity, exact hostname coverage and trust on TLS port 443. Review the issuer and expiration date.
Check a certificate →
Which checker should I use?
Use the Domain Search to compare registration options across registrars.
Use the Domain Checker for published registration details, DNS records and website reachability. The Technology Checker groups detected platforms, frameworks and services, with versions when available. The Performance Checker offers a page-level lab test or available real-user data across the website origin.
Use the SSL Checker to inspect certificate validity, coverage of an exact hostname and trust on port 443. It checks the certificate, not the website's overall security.