Proton Authenticator

Secure, end-to-end encrypted, open source, and available on every device

Protect your accounts with Proton Authenticator, a private and secure cross-device two-factor authentication (2FA) that works offline. Created by Proton, the creators of Proton Mail, Proton VPN, Proton Drive, and Proton Pass.

Proton Authenticator is open-source, end-to-end encrypted, and backed by Swiss privacy laws. It’s the safest way to generate and store your one-time passwords (TOTP) for 2FA Login.

Why Proton Authenticator?

- Free to use: No Proton account required, ad-free.

- Offline support, on mobile and desktop apps

- Sync your 2FA codes to all your devices with end-to-end encryption.

- Enable automatic backups for peace of mind

- Easily import from other 2FA apps, or export from Proton Authenticator.

- Protect your account with biometrics or a PIN code.

- Open-source transparency, verifiable code.

- Protected by Switzerland’s privacy laws.

Trusted by millions. Built by Proton.

Take control of your digital security today.