An open-source two-factor Time-based One-Time Password (TOTP) authenticator
Open Two-Factor Authenticator aims to provide an open-source two-factor authentication to browsers and Android devices with synced storage.
Using Open Two-Factor Authenticator, you can have your encrypted keys stored in the browser's synced storage which allows you to sync them across multiple devices.
Currently, Open Two-Factor Authenticator supports Firefox on Desktop, Firefox on Android, Chrome and Opera browsers. Standalone Android implantation is still in progress.
To report a bug please open a new issue on:
To see the FAQ page visit: