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TOTP Code Generator
Generate time-based one-time passwords for two-factor authentication (2FA).
How TOTP Works
TOTP (Time-based One-Time Password) generates a new code every 30 seconds based on a shared secret key and the current time.
It's the same algorithm used by Google Authenticator, Authy, and other 2FA apps. The standard is defined in RFC 6238.
Your secret key never leaves your browser. All code generation happens locally using the Web Crypto API.