I don’t know your workflow or demands so maybe this is simplistic. But you can just drop any file over a 1Password entry and it gets attached to that entry. So

I don’t know your workflow or demands so maybe this is simplistic. But you can just drop any file over a 1Password entry and it gets attached to that entry. So, if you have a .crt, .pfx, .txt or whatever, just attach it to the entry.