How do i convert a pem format certificate to a der format certificate using openssl?

[saolasosme]

Check the type of file the pem certificate is.

$ file mycert.pem
mycert.pem: PEM certificate

Convert certificate from pem to der format.

$ openssl x509 -outform der -in mycert.pem -out mycert.der

Check the file type of the converted file. The converted file is a binary encoded file.

$ file mycert.der 
mycert.der: data