Converting electronic files comprising financial transaction data for supporting international electronic financial transactions. A gateway financial institution that processes electronic payments can organize files comprising international financial transactions according to the destination country. The gateway financial institution can transmit the organized transaction files to an interface that is coupled to the computing systems of foreign financial institutions. The interface can convert the transaction files from the format of the originating financial institution to the format of the receiving financial institution. The converted transaction files can then be forwarded to the respective foreign financial institutions. The interface can also transmit additional data associated with the transaction files to support settlement of the transactions.