TOTP Authenticator - 2FA OTP Code Generator

Secure and fast TOTP authenticator for 2FA login. Generate OTP codes offline and manage multiple accounts easily.

Generate two-factor authentication codes, manage accounts, and fill codes into websites from your browser. Add accounts by uploading, pasting or dropping a QR image, or by pasting an otpauth link. Generate standard TOTP and Steam Guard codes, reorder accounts, and keep optional website addresses for easier filling. Everyday setup stays simple. Expand Advanced settings only when your provider requires SHA-256 or SHA-512, eight digits, or a different refresh interval. Standard accounts keep the usual six-digit, 30-second defaults. Back up and restore accounts with JSON, including password-encrypted backups. Import compatible authenticator exports and export account QR codes. Optional password protection locks access to your account vault. Code generation works offline. Accounts and settings use browser storage and may synchronize through your Chrome account. Optional Steam linking contacts Valve's official services only when you use that feature. Filling sends the selected code to the website you choose. There is no developer-operated account server, advertising or analytics. Existing compatible accounts stay usable after updating, without a forced account-vault migration. Older account stores retain standard six-digit, 30-second TOTP and Steam support. Custom parameters are rejected when the existing storage format cannot preserve them. Protected accounts continue to require their original password. Changing your vault password also re-encrypts the recovery copies observed on this device. If a retained copy cannot be unlocked, MFA asks you to resolve it before changing protection. If synchronization is incomplete or conflicting, the extension keeps recovery data and asks you to resolve it. Export any versions you need before choosing a conflict resolution. Update your devices to the same extension version, wait for synchronization and avoid editing accounts on several devices at once. Plain backups and recovery exports may contain account secrets. Keep them private. Password changes cannot update previously exported backups or copies on offline devices. Browser synchronization cannot guarantee atomic updates across devices, so keep a safe backup of important accounts. Support: https://github.com/titxue/mfa/issues