In some situations, you may need to convert an SSL Certificate format to a different format. This video shows how to do so.
Option 1. Go to https://www.sslshopper.com/ssl-converter.html, choose file to be converted. You may need key text file. If you want to convert to PFX, you may enter the password.
Option 2: Go to https://decoder.link/converter, enter the Certificate File, Key File, Bundle File, and password. Click convert
Please view this step y step video: