SSL Certificate Checker
Retrieve the live TLS certificate for a hostname: issuer, subject, SAN list, validity window, signature algorithm and the negotiated TLS version and cipher.
About the SSL Certificate Checker
Retrieve the live TLS certificate for a hostname: issuer, subject, SAN list, validity window, signature algorithm and the negotiated TLS version and cipher.
Queries run from our global edge network, so you see what a neutral observer on the public internet sees — not what your local network or ISP resolver happens to have cached.
Frequently asked questions
What does the SSL Certificate Checker do?
Retrieve the live TLS certificate for a hostname: issuer, subject, SAN list, validity window, signature algorithm and the negotiated TLS version and cipher.
Is the SSL Certificate Checker free to use?
Yes. The SSL Certificate Checker is completely free with no account, no signup and no usage limits for normal use.
Do you log the lookups I run?
No. Queries are processed at the edge and returned straight to you. We do not retain, profile or sell your lookup history.