SSL Certificate Viewer

Inspect an X.509 certificate from a PEM or DER file, or paste PEM text — locally in your browser

How to Use SSL Certificate Viewer

1. Upload a PEM, CRT, CER, or DER certificate file, or paste PEM text into the editor.
2. Review the parsed subject, issuer, validity dates, serial number, signature algorithm, SANs, and SHA-256 fingerprint.
3. For a live domain, use the generated OpenSSL command or the SSL Labs link to inspect its certificate chain.

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