You don't need a server for Syncthing. Devices synchronize when they're both connected. It's decentralized. But Syncthing doesn't let you share a link to a fil

You don't need a server for Syncthing. Devices synchronize when they're both connected. It's decentralized. But Syncthing doesn't let you share a link to a file. For that there might be OwnCloud-based solutions.