A system enables data synchronization for data files shared between or among multiple devices. When a shared data file is modified on one of the computing devices, metadata describing or otherwise enabling recreation of that modification are generated. To enable synchronization of the shared data file, the metadata—rather than the modified shared data file—are transmitted to other devices. These other systems can then use the metadata to recreate the modification of the shared data file and thus achieve data synchronization without requiring retransmission of the shared data file after each modification thereto.