Converting SSL Certificate (.crt) To Other Formats (der, p7b, pfx)

In the zip file that you have received for your Sectigo SSL certificate, it will only contain 2 files.

The first file is .crt and the second file is .ca-bundle file.

If you require the SSL to be in the format like der, p7b and pfx, kindly note that you will have to convert it.

There are 2 ways to convert the file.

The 1st way is to use OpenSSL by using command below.

.crt to .der:
openssl x509 -outform der -in certificate.pem -out certificate.der

.crt to .p7b:
openssl crl2pkcs7 -nocrl -certfile certificate.cer -out certificate.p7b -certfile CACert.cer

.crt to pfx:
openssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt -certfile CACert.crt

The 2nd way is to use a website like which you can use to convert the .crt file to the extension that you require.

Did you find it helpful? Yes No

Send feedback
Sorry we couldn't be helpful. Help us improve this article with your feedback.