X.509 Certificate & CSR Inspector
Decode a PEM X.509 certificate or CSR: subject, issuer, dates, SANs, public key and SHA-256 fingerprint.
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Local reading of the ASN.1 structure: the tool checks neither the chain of trust nor revocation. A fullchain.pem file shows one card per certificate.
- Subject
- Issuer
- Serial number
- Valid from
- Valid until
- Public key
- Alternative names (SAN)
- SHA-256 fingerprint