About 2FA.Online
A free, secure, and privacy-focused two-factor authentication code generator that works entirely in your browser.
Our Mission
We believe that everyone deserves access to secure, reliable two-factor authentication tools without compromising their privacy or paying expensive fees. 2FA.Online was created to provide a simple, trustworthy solution that puts your security and privacy first.
Privacy First
All your secret keys are stored locally on your device. Nothing is sent to our servers, ensuring your sensitive information never leaves your control.
Works Offline
Once loaded, the generator works without an internet connection. Perfect for travel, areas with poor connectivity, or when you need maximum security.
Universal Compatibility
Generates standard TOTP codes that work with Google Authenticator, Authy, Microsoft Authenticator, and any other RFC 6238 compliant application.
Open Source Security
Built with transparency in mind. Our code uses industry-standard cryptographic libraries and follows security best practices you can verify.
How It Works
Enter Your Secret Key
Paste the secret key provided by your service (Google, GitHub, etc.) when setting up 2FA.
Automatic Code Generation
Our algorithm generates a new 6-digit code every 30 seconds using the TOTP standard.
Use Your Code
Click to copy the code and paste it into your login form. Codes refresh automatically.
Security & Privacy
Local Storage Only: Your secret keys are stored in your browser's local storage and automatically deleted after 7 days. They never leave your device.
No Analytics: We don't track your usage, collect personal data, or use cookies for tracking purposes.
HTTPS Only: All connections are encrypted and we use modern security headers to protect against common web vulnerabilities.
Standard Algorithms: We use the same cryptographic standards (HMAC-SHA1, Base32) as major authenticator apps.
Frequently Asked Questions
Is this safe to use?
Yes! Your secret keys never leave your device. We use the same security standards as Google Authenticator and other trusted apps.
What if I lose my secret keys?
Since everything is stored locally, clearing your browser data will remove saved keys. Always keep backup codes from your services.
Does this work on mobile?
The site is fully responsive and works great on phones and tablets.
Is this free?
Yes, completely free with no hidden costs, premium features, or subscription plans.