X.509 Certificate Decoder
Decode PEM certificates and inspect validity, SANs, public keys, fingerprints, and certificate chains.
Certificate input
Paste multiple certificates (a chain) and inspect them one by one.
About X.509 Certificate Decoder
Paste one or more public PEM certificates to inspect subjects, issuers, validity dates, and fingerprints.
Does parsing prove the certificate is trusted?
No. Parsing is not chain, hostname, revocation, or trust-store validation. Never paste a private key into a certificate inspector.