Privacy First
Your secret keys never leave your browser. They are used only to generate TOTP codes and are never stored, uploaded, or transmitted to any server.
In-memory onlyAbout 2FASite
Free online 2FA Code generator for two-factor authentication. Runs entirely in your browser to keep your secret keys private, secure, and under your control.
Our Mission
We believe strong online security should be simple, private, and accessible to everyone. That's why 2FASite was built—to provide a free, reliable browser-based TOTP generator that protects your privacy while making two-factor authentication quick and easy. Your secret keys stay on your device, and your data remains under your control.
Works Offline
After the initial page load, the generator works completely offline. Generate TOTP codes anywhere—even while traveling, in low-connectivity areas, or whenever you prefer to keep everything local.
No Internet RequiredUniversal Compatibility
Generate RFC 6238-compliant TOTP codes that work with Google Authenticator, Microsoft Authenticator, Authy, and virtually any compatible authentication app.
RFC 6238 StandardOpen Source Security
Built with transparency in mind. 2FASite uses the browser's trusted Web Crypto API and follows established security best practices, so you can verify how everything works.
Transparent & SecureHow It Works
Enter Your Secret Key
Paste the TOTP secret key provided during your account's two-factor authentication setup to start generating secure verification codes.
Automatic Code Generation
A new 6-digit TOTP verification code is generated every 30 seconds in accordance with the RFC 6238 standard.
Use Your Code
Click to copy the current verification code, then paste it into the login form. A new code is generated automatically every 30 seconds.
Security & Privacy
No Secret Storage: Your secret keys exist only in the open page while generating codes and are never written to browser storage.
Privacy First: We don't collect personal information, monitor how you use the site, or use tracking cookies or analytics.
Secure Connections: All communication is protected with HTTPS, and modern browser security headers help defend against common web-based attacks.
Standards Compliant: 2FA Site implements the RFC 6238 TOTP standard using Base32 secrets and HMAC-SHA1, ensuring compatibility with leading authenticator apps.
Frequently Asked Questions
Is 2FA Site safe to use?
Yes. All TOTP codes are generated locally in your browser, so your secret keys never leave your device. No data is uploaded or stored, and the generator follows the RFC 6238 standard used by popular authenticator apps.
What happens if I lose my secret key?
2FA Site does not store or back up your secret keys. Be sure to save the original setup key or the recovery codes provided by the service when you enable two-factor authentication.
Can I use 2FA Site on my phone?
Yes. 2FA Site is fully responsive and works smoothly on smartphones, tablets, laptops, and desktop computers with any modern web browser.
Is 2FA Site really free?
Yes. All features are available at no cost. There are no subscriptions, premium plans, hidden fees, or account registration requirements.