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PEM to DER Converter

Paste a PEM certificate to get its DER hex encoding. DER is the raw binary format used by many systems and APIs.

Paste a PEM certificate.

Result

Enter your values and press Calculate — the result appears here.

Worked examples

Convert PEM to DER

  • pem = -----BEGIN CERTIFICATE-----\nMIIB...\n-----END CERTIFICATE-----

Result: 308201...

Frequently asked questions

When would I need DER format?

DER is used by some APIs, Java keystores, Windows certificate stores, and binary protocols. Most modern systems accept PEM.

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