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Controlled server processing

Free Online SSL Certificate Checker

Inspect the verified TLS certificate and validity dates.

Inputs are sent to this server. Uploads are processed temporarily and not retained. Network diagnostics may query public resolvers or the destination website.

Result



How to use SSL Certificate Checker
Inspect the verified TLS certificate and validity dates. The HTTPS connection verifies the certificate chain and hostname using the server trust store. Expired, untrusted and mismatched certificates cause a request error.
  1. Set Public hostname, IP, CIDR or HTTPS URL.
  2. Run the tool, review the result and its stated limitations, then copy or download if needed.
Example & practical use
Inspect the verified TLS certificate and validity dates. The example below demonstrates Public hostname, IP, CIDR or HTTPS URL.
Example input:
{
  "target": "https://example.com"
}
Result: Actual processed output or live service answers; values depend on the input and request time.
Features & result limitations
The HTTPS connection verifies the certificate chain and hostname using the server trust store. Expired, untrusted and mismatched certificates cause a request error.
Frequently asked questions
What inputs does SSL Certificate Checker accept?
Public hostname, IP, CIDR or HTTPS URL
How should I interpret the SSL Certificate Checker result?
The HTTPS connection verifies the certificate chain and hostname using the server trust store. Expired, untrusted and mismatched certificates cause a request error.
Where does SSL Certificate Checker process my data?
Inputs are processed on this server. Uploads use temporary files removed at request end. Public diagnostics contact the named resolvers or website. Private text is not stored in usage counters.