If you need a PFX certificate that displays a JPG image (e.g., for a digital signature stamp), follow these steps using OpenSSL (free, offline).
If you need a PFX that browsers or operating systems trust (e.g., for an HTTPS server), you cannot use a JPG or a free online tool. You must buy a certificate from a trusted CA: jpg to pfx converter online better free
We need a private key to put inside the PFX. Use a trusted free online generator. If you need a PFX certificate that displays a JPG image (e