Proton Authenticator

Proton Authenticator is a privacy-first two-factor authentication app for fast, secure MFA. Generate TOTP 2FA codes for your favorite accounts with one tap, scan QR codes in seconds, and keep everything protected with end-to-end encrypted backup and sync via your Proton account. Designed for security and productivity, it offers offline access, biometric lock, and a clean, ad-free experience. Ideal for anyone who needs a reliable 2FA app for stronger account security across email, social media, developer tools, and more. Keywords include 2FA app, MFA, TOTP, authenticator, security, encrypted backup, productivity.

1. Download and install Proton Authenticator from your app store. 2. Open the app and sign in with your Proton account to enable encrypted backup and sync, or continue offline for local-only storage. 3. Add your first account: tap Add, scan the website’s QR code or paste the secret key, then name the entry. 4. Secure the app: enable biometric lock and set auto-lock in Settings for extra protection. 5. Use during login: when a site asks for a 2FA code, open Proton Authenticator, copy the 6-digit code, and paste it to complete sign-in. Repeat to add more accounts and organize with search and sorting.