TOTP 驗證碼產生器

TOTP (Time-based One-Time Password) is a temporary code that changes every 30 seconds. It's commonly used for two-factor authentication (2FA) on websites like Google, GitHub, and many others. The code is generated using a shared secret key and the current time, making it secure without requiring network connectivity.

Enter your Base32-encoded secret key in the input field. This is the secret you get when setting up 2FA on a website (usually shown as a QR code or text). The tool will immediately generate a 6-digit code that refreshes every 30 seconds. A progress bar shows remaining time. Copy the code and use it for authentication.

When enabling 2FA on a service, choose 'can't scan QR code' or similar option to reveal the secret key as text. It's typically a 16-32 character Base32 string. Store this key safely - it's your backup if you lose access to your authenticator app.