Offline OTP Generator
2FA codes that stay on this device
Generate TOTP and HOTP codes in the browser, save accounts in localStorage, and move backups with password-encrypted JSON. No uploads, no trackers, no network calls.
Live vault
Current OTP codes
0 saved
No OTP accounts saved yet.
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Offline OTP with browser-native crypto
Codes are produced with crypto.subtle.sign using HMAC and RFC 4226 dynamic truncation. TOTP uses your device clock; HOTP uses a local counter that advances only when you press Next.