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OpenSSL Format Conversion#

PEM ↔ DER#

# PEM to DER
openssl x509 -outform der -in mycert.pem -out mycert.der

# DER to PEM
openssl x509 -inform der -in mycert.der -out mycert.pem

PEM + Key → PFX#

openssl pkcs12 -export -inkey rsa_key.pem -in mycert.pem -out mycert.pfx

See Also#

👉 Certificates
👉 Overview