Generate verification codes instantly. Secret keys never leave your browser.
Two-factor authentication (2FA) adds an extra layer of protection to your accounts. Instead of relying only on a password, it requires a time-based verification code generated using a shared secret key.
Most authenticator apps use a method called TOTP (Time-Based One-Time Password). This method generates a new 6-digit code every 30 seconds based on:
Your device and the service provider independently calculate the same code. If the numbers match, access is granted.
Because codes expire quickly and are generated locally, TOTP significantly reduces the risk of unauthorized access—even if a password is compromised.
Learn more in our guides:
Is this tool secure?
Yes. All 2FA codes are generated locally in your browser.
Are my secret keys stored?
No. 2faco does not store or transmit authentication secrets.
Can I paste otpauth URLs?
Yes. Full otpauth:// URLs are supported and automatically parsed.