Secure and end-to-end encrypted authenticator, available on every device.
Proton Authenticator is a free, private 2FA authenticator app that generates secure one-time passwords (OTP) on all your devices, even offline. Add multi-factor authentication (MFA) to your online accounts in seconds. From the creators of Proton Mail, Proton VPN, Proton Drive, and Proton Pass.
Open-source, end-to-end encrypted, and protected by Swiss privacy laws, Proton Authenticator is the safest way to generate and store your 2FA codes and TOTP tokens.
WHY CHOOSE PROTON AUTHENTICATOR?
Free authenticator app: no Proton account required, no ads
Works offline: generate OTP codes on mobile and desktop without a connection
Encrypted sync: keep your 2FA codes on all your devices with end-to-end encryption
Automatic backups: never lose access to your MFA-protected accounts
Easy import and export: move your OTP tokens from other 2FA apps in a few taps, or export them anytime
App lock: secure your authenticator app with biometrics or a PIN code
Open source: transparent, verifiable code
Swiss privacy: protected by Switzerland's privacy laws
Trusted by millions. Built by Proton.
Secure every login with a private 2FA authenticator app. Download Proton Authenticator today.