The Secure File Transfer Protocol is an encrypted protocol to exchange files between two computers, e.g. your own computer and the Uberspace host.
Since SFTP is based on SSH, you can use the SSH password.
Cyberduck, a macOS and Windows client.
FileZilla, a multi-platform client available for Windows, Linux and macOS.
WinSCP, a Windows-only client.
FTP is an outdated protocol that does not use encryption in its standard implementation. While there are implementations such as FTP over SSL (FTPS), we believe that using a more modern protocol is the better choice.
Some SFTP clients offer rudimentary “shells” to run commands on the server via SSH. While this may work for some non-interactive commands, it can cause problems when using interactive tools and other commands. We generally recommend to use a full-featured ssh client to run commands on the server.