About
2FAS is a free two-factor authentication app that generates TOTP and HOTP codes to secure your online accounts. It syncs across mobile devices, works offline, and requires no account or password storage. The app is open-source and community-driven, with app protection via passcode or biometrics, token backups for easy restoration, and one-tap authentication through browser extensions. 2FAS supports multi-language and includes quick setup guides.
Highlights
- TOTP and HOTP algorithm support for two-factor authentication
- Syncs across multiple mobile devices with automatic backups
- Works completely offline with no account or password storage required
- Open-source and community-driven with app protection via passcode or biometrics
- One-tap authentication through browser extensions
Best for
Users securing personal and work accounts with two-factor authentication who want a free, privacy-focused authenticator that works offline and syncs across devices without requiring account registration.
At a glance
2FA Authenticator (2FAS) is rated 4.7 out of 5 from 19,151 ratings and is available on iOS and Android — all free to download.
It is developed by Two Factor Authentication Service Inc..
Screenshots
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