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SSL Checker

Fetch the public TLS certificate for a hostname on port 443. See CN, issuer, validity and SANs — not a security audit or pentest.

We open a TLS connection to port 443 and read the public certificate chain presented by the host. Not a vulnerability scan.

FAQ

SSL checker questions

Is this a security audit?

No. It reads the public certificate shown on port 443. It does not test vulnerabilities, misconfigurations or private keys.

Does this use OpenAI?

No. The check fetches the public TLS certificate only. There is no AI step and nothing is sent to OpenAI for this tool.

Why might the check fail?

Wrong hostname, closed port 443, SNI mismatch, firewalls or temporary network errors can block the handshake.

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