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, offering app protection via passcode or biometrics, easy token backup and restore, and one-tap authentication through browser extensions. 2FAS supports multi-language and is designed for simplicity without compromising security.
Highlights
- Syncs authentication tokens across multiple mobile devices
- Works completely offline without internet connection
- Open-source code with community-driven development
- App protection with passcode or biometric authentication
- One-tap authentication via browser extensions
- Supports TOTP and HOTP algorithms
Best for
Anyone securing multiple online accounts who wants a simple, private authenticator that works offline and syncs across devices without requiring an account or storing personal data.
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 securely log into accounts. It syncs across mobile devices, works offline, and stores no passwords or personal data.
- Does 2FAS require an account?
- No. 2FAS is 100% anonymous and does not require an account to use. You can authenticate without creating a login or providing any personal information.
- Can I restore my 2FA tokens if I lose my phone?
- Yes. 2FAS includes backup functionality that lets you easily restore your tokens, protecting you from losing access to your accounts.
- Does 2FAS work without internet?
- Yes. 2FAS works completely offline, so you can generate authentication codes even without an internet connection.
- 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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