2FA Authenticator

Open-source Chrome extension that generates TOTP 2FA codes locally, with an optional encrypted vault.

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2FA Authenticator is an open-source browser extension that generates two-factor login codes entirely on the user's device, with no servers or analytics involved. It offers QR code import from an image, camera, or browser tab, one-click insertion of a code into a login field, and an optional encrypted vault, aimed at people who want a private, self-hosted alternative to a cloud-based authenticator app.

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