TOTP Generator
Generate Time-based One-Time Passwords from a base32 secret — RFC 6238 compatible. Free, private, runs in your browser.
TOTP follows RFC 6238 — same algorithm as Google Authenticator, Authy, 1Password, and most MFA apps. Compatible secrets are usually shown as base32 next to the QR code.
The secret never leaves your browser. Treat it like a password — anyone with it can mint valid codes for the same account.