When the CSR is not generated through Everleap and the certificate authority does not provide a PFX, the CRT and KEY files can be combined into a PFX using OpenSSL
or a site based converter like the one found on SSL Shopper
. The latter also contains the OpenSSL Commands to combine the files.
When using the site based conversion, click Choose File1 below Certificate File to Convert and select the .crt file. Then click the Type to Convert To2 drop-down, change it to PFX/PKCS#12 and the page will update with more options.
Now click the Choose File1 below Private Key File and select the .key file. Then enter a PFX Password2 and click Convert Certificate to complete the process.