Provides an online time-based one-time password (TOTP) generation tool, which generates TOTP directly in the browser without uploading any data to the server, ensuring the security of the data processing process and user privacy protection. This tool is particularly useful in scenarios that require enhanced security measures, such as two-factor authentication (2FA). Users can rely on this tool to generate one-time-use passwords based on the current time and a pre-shared key, ensuring the security of the login process or other sensitive operations.