security Offline TOTP (2FA) Code Generator

Client‑side only. Uses Material Icons; no other network access.

2FA secret (Base32) or otpauth URI

Invalid secret or unsupported format.

tune Advanced

Algorithm

Digits

Period (s)

If you paste an otpauth URI, settings are auto-detected. Defaults: 6 digits, 30s, SHA‑1.

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Privacy‑first offline TOTP/OTP authenticator

Generate time‑based one‑time passwords (TOTP) for two‑factor authentication (2FA) in your browser. Import otpauth URIs or Base32 secrets; choose HMAC‑SHA‑1, HMAC‑SHA‑256, or HMAC‑SHA‑512; create 6–8 digit OTP codes. Compatible with popular authenticator apps.

Offline, client‑side TOTP/OTP — no tracking, no network.
Paste otpauth URI or Base32 secret; adjustable period and digits.
Works as a lightweight 2FA authenticator in any modern browser.