SSL Certificate Viewer

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Decode PEM and DER certificates and CSRs: subject, validity, SANs and fingerprints.

How to use the SSL Certificate Viewer

1Drop a .pem, .crt, .cer or .csr file, or paste the PEM text.
2Read subject, issuer, validity, domains and key details in plain terms.
3Check the order of a certificate chain and copy fingerprints.

Frequently asked questions

Is it safe to paste a certificate here?

Certificates are public by design, and nothing leaves your browser anyway. Never paste a private key into any website, though.