This page will attempt to help you convert your certificate to: PFX or Plesk

You'll need the holy grail, [[https://www.sslshopper.com/ssl-converter.html]]

If you're an idiot and using 123Reg, Download the certificate for Apache, not exchange/IIS. This will give you Standard PEM format cert files.
if you're less of an idiot and using ClouDNS, the SSL certificate comes in the correct Standard PEM format already.

On the website, you'll need to fill in the below:\\
**Type to convert from:**, Standard PEM\\
**Type to convert to:** PFX/PKCS#12\\

Certificate file to convert - The Website Certificate.crt\\
The Private Key - key.txt\\
Chain Certificate File 1 (optional) - SectigoRSADomainValidationSecureServerCA.crt (ClouDNS)\\
Chain Certificate File 2 (optional) - UserTrustRSAAAAACA.crt (ClouDNS)\\