Nitrokey App 2
Graphical application to manage and use Nitrokey 3 devices
...The software also provides firmware update tools to maintain device security and functionality. It supports managing the separate PINs used for FIDO2 authentication and the password manager. Additional utilities include application update checks, diagnostic log exporting, and device troubleshooting. Available for Windows, macOS, and Linux, Nitrokey App 2 simplifies security key administration without requiring command-line tools.