Found this which didn't help, but could be a useful reference in the future... OpenSSL Convert PEM Convert PEM to DER openssl x509 -outform der -in certificate.pem -out certificate.der Convert PEM to P7B openssl crl2pkcs7 -nocrl -certfile certificate.cer -out certificate.p7b -certfile CACert.cer Convert PEM to PFX openssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt -certfile CACert.crt OpenSSL Convert DER Convert DER to PEM openssl x509 -inform der -in certificate.cer -out certificate.pem OpenSSL Convert P7B Convert P7B to PEM openssl pkcs7 -print_certs -in certificate.p7b -out certificate.cer Convert P7B to PFX openssl pkcs7 -print_certs -in certificate.p7b -out certificate.cer openssl pkcs12 -export -in certificate.cer -inkey privateKey.key -out certificate.pfx -certfile CACert.cer OpenSSL Convert PFX Convert PFX to PEM openssl pkcs12 -in certificate.pfx -out certificate.cer -nodes