SSL Decoder

This site checks the SSL/TLS configuration of a server. It shows you the full certificate chain, including all kinds of information about every certificate, as well as connection information like ciphersuites and protocol support.

Fill in either host + port or paste a CSR/Certificate. Port defaults to 443.

Host

Port

Fast check (no connection details, no TLSA check, no certificate transparency submission)

CSR / Certificate

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