Can synced passkeys be used across different platforms?

Yes, synced passkeys can work across different platforms, but their compatibility depends on the cloud ecosystem managing them. Apple, Google, and Microsoft have different implementations of passkey synchronization, which can impact cross-platform usability.

• Passkeys sync seamlessly across all Apple devices (iPhone, iPad, Mac).
• Stored securely in iCloud Keychain with end-to-end encryption.
• Cannot be directly used on non-Apple platforms unless shared via QR codes or nearby device authentication.

• Passkeys sync across Android devices and Chrome browsers signed into the same Google account.
• Works across different Chromebooks, Windows PCs (via Chrome), and some third-party password managers.
• Does not sync with Apple’s iCloud Keychain.

• Currently, Windows Hello uses device-bound passkeys.
• Microsoft has not yet implemented synced passkeys for Windows.
• Users relying on Windows must use a third-party password manager (like 1Password or Dashlane) for passkey syncing.

• Some services, like 1Password, Dashlane, and KeePassXC, allow cross-platform passkey storage and synchronization.
• These managers bridge the gap between Apple, Google, and Microsoft ecosystems, making passkeys usable across different devices.

While passkeys work across multiple devices, true cross-platform support is still evolving:

• Apple and Google do not sync passkeys between their ecosystems.
• Windows lacks native passkey synchronization, requiring third-party solutions.
• Users may need to manually transfer passkeys between platforms using device authentication prompts (e.g., QR code sign-ins).

Synced passkeys enable cross-device authentication, but full cross-platform interoperability is still dependent on cloud ecosystems. Users in Apple, Google, or Microsoft environments will experience smooth synchronization within their ecosystem, but switching between them may require additional steps or third-party password managers.