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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.