2FA Authenticator (2FAS)
Two Factor Authentication Service Inc.
About
2FAS is a free two-factor authentication app that secures your online accounts with TOTP and HOTP algorithms. 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
- Syncs authentication tokens across mobile devices with cloud backup and restoration
- Open-source and community-driven with full transparency and no password storage
- Works completely offline with no account required for anonymous use
- App protection via passcode or biometrics to secure your tokens
- One-tap authentication through 2FAS Browser Extensions
- Supports TOTP and HOTP algorithms for broad account compatibility
Best for
Anyone securing personal or work accounts who wants a free, privacy-focused authenticator that works offline and syncs across devices without requiring an account or storing passwords.
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
Frequently Asked Questions
- Is 2FA Authenticator (2FAS) free?
- Yes — 2FA Authenticator (2FAS) is free to download on iOS and Android.
- What platforms is 2FA Authenticator (2FAS) available on?
- 2FA Authenticator (2FAS) is available on iOS and Android.
- What is 2FAS?
- 2FAS is a free, open-source two-factor authentication app that generates TOTP and HOTP codes to verify your identity and protect your accounts. It syncs across mobile devices, works offline, stores no passwords, and requires no account.
- Does 2FAS work offline?
- Yes, 2FAS works completely offline. You can generate authentication codes without an internet connection.
- Can I sync 2FAS across multiple devices?
- Yes, 2FAS syncs across your mobile devices and includes backup and restoration features to easily recover your tokens.
- Is 2FAS open-source?
- Yes, 2FAS is open-source, transparent, and community-driven. You can review the code on GitHub at https://github.com/twofas.
- What are the alternatives to 2FA Authenticator (2FAS)?
- 2FA Authenticator (2FAS) is similar to Stratum - Authenticator App, Proton Pass - Password Manager, Aegis Authenticator - 2FA App, and Proton Authenticator. Browse related apps by tag: open source, 2fa, mfa, password manager, and security.
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