Decode certificate
certificate = -----BEGIN CERTIFICATE-----\nMIIB...\n-----END CERTIFICATE-----
Result: Structured certificate fields.
Certificate Decoder
Paste a PEM or DER certificate to get a structured breakdown of every field: subject, issuer, validity, serial, extensions, public key info.
Enter your values and press Calculate — the result appears here.
Worked examples
Frequently asked questions
Is this the same as the Certificate Inspector?
Similar functionality. This tool focuses on structured field output while the Inspector provides a quick overview.
📚 Learn More
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