Proton Authenticator

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.