SN Authenticator

Local-only TOTP vault. No account, no server, no sync. Everything stays encrypted on this device.

How it works: SN Authenticator is a 2FA (TOTP) code vault that lives entirely in your browser. On install you create a master password that encrypts everything you store — that password never leaves your device, we never see it, nobody does. Every time you open the extension you have to enter it to unlock; close the popup and it locks itself again, no session stays open. There are three ways to add an account: paste the otpauth:// link the service gives you, type the details in by hand, or scan the QR code (by sharing your screen or uploading a screenshot). The 6-digit codes are generated locally and refresh every 30 seconds, same as any other 2FA app. For backup, you can export your vault to a file — it stays encrypted, so it's useless without your password — and import it again whenever you want, on the same device or a different one. Why install it: - No account, no server, no cloud sync by default — everything stays on your device. - The master password is the only key. Nobody else has it, nobody can recover it for you if you lose it — that's by design. - Simple interface, no clutter, available in 9 languages (auto-detects your browser's language). - Doesn't send anything over the network beyond what's strictly needed for the extension to work. - Built for anyone who wants their 2FA kept separate from any online account, without relying on a third party to protect it.