My first thought was to just manipulate it in Sublime Text, the file isn't too large to work on in memory. I also noticed the data seemed to be very consistentl

My first thought was to just manipulate it in Sublime Text, the file isn't too large to work on in memory. I also noticed the data seemed to be very consistently formatted. Search "name":".+?".*?"creditcard":".+?" to grab every line with non-empty Name and CC. Alt+Enter to edit all lines at once. Remove all the other data and json syntax. This was pretty easy because "name" is always the first field on the line and "creditcard" always the final field.