ToolsSSL checker
$ crtsh example.com
Live
SSL certificate checker
SSL certificate checker
Search certificate transparency records for a domain using crt.sh public JSON.
GET/v1/tls
⚠ noteNo certificate search yet.
⚠ noteThis static tool reads public certificate transparency entries from crt.sh. It does not perform a live TLS handshake against the origin server.
Network tool FAQ
Does this perform a live TLS handshake?
No. It searches public certificate transparency data and does not connect to the origin server over TLS.
Why do old certificates appear?
Certificate transparency logs are append-only records, so expired or replaced certificates can still appear.
Can this prove my site is configured correctly?
Not by itself. It confirms certificate issuance records, not live server chain or protocol configuration.
Why are subdomains included?
Including subdomains helps reveal related certificate issuance for wildcard and host-specific certificates.
What should I check in the result?
Review DNS names, issuer, not-before, and not-after dates for unexpected certificates or expiration risk.
Related network tools
All tools →What is my IPYour public IPv4, IPv6, browser, OS, and user agent — instantly.GET/v1/ip
Ping testBrowser HTTPS round-trip latency, 5 samples, with TLS and HTTP overhead.POST/v1/ping
IP geolocationCity, country, ISP, ASN, and coordinates. IPv4 and IPv6 supported.GET/v1/geo/{ip}
DNS lookupQuery A, AAAA, MX, TXT, CNAME, NS records over DoH.GET/v1/dns/{type}
WHOIS lookupRegistrar, creation/expiry, nameservers via authoritative RDAP.GET/v1/whois