2FA Verification Code Generator
2FA Verification Code Generator
This free online 2FA (Two-Step Authenticator) generator can instantly generate a 6-digit TOTP (Total Authenticator Protocol) dynamic CAPTCHA by simply entering your 2FA key. It is fully compatible with mainstream authenticator applications such as Google Authenticator and Microsoft Authenticator, and requires no software installation; simply open a web browser to use it.
Instructions
- Enter the 2FA key (Base32 encoded, usually a string of uppercase letters and numbers) included in the account you purchased.
- Click the "Generate" button, and the system will instantly calculate a 6-digit dynamic verification code based on the standard TOTP algorithm.
- The verification code refreshes automatically every 30 seconds, and the page displays a countdown. A new verification code will be automatically generated after the code expires.
- The generated CAPTCHA is fully compatible with all standard TOTP validators, including Google Authenticator, Authy, and Microsoft Authenticator.
What is 2FA?
Two-Factor Authentication (2FA) is a security mechanism that requires users to provide two different verification factors to confirm their identity. In addition to a traditional password, 2FA also requires a dynamically generated verification code in real time, which greatly enhances account security.
TOTP (Time-based One-Time Password) is the most commonly used 2FA implementation, generating a one-time verification code based on the current time and shared key, and updating it every 30 seconds. This tool uses the standard TOTP algorithm (RFC 6238), ensuring that the generated verification code is fully compatible with all mainstream validator applications.
Enter your key and click "Generate", the verification code will appear here