Well actually there really is no simple process. You can google around for the actual order characters are mapped to, that's no problem. But unless you want to type them all out, some sort of script, or automation process is necessary. Personally I use Gimp, with a py-fu script that I modified.
I could give you the script, but the funny thing is you have to install three other things besides python just to get it to work.
You might check around there's probably a php service out there that uses the gd libraries or something similar.