Offline 2FA Generator od George-Paul B.

Generate two-factor authentication (2FA) codes completely offline. No internet connection required, no data collection, no cloud sync. Your TOTP secrets stay private and secure on your device.
Features:

Offline TOTP code generation (RFC 6238 compliant)
Import accounts via QR code scan from PNG/JPEG images
Export accounts as QR code PNG for easy backup and transfer
Import/export accounts as JSON for bulk operations
Parse otpauth:// links directly
Drag & drop to reorder accounts
Automatic duplicate detection
Optimized UI for both popup and tab modes
Clean, intuitive interface
Zero data collection - completely private

Perfect for securing your accounts with Google Authenticator-compatible codes without relying on cloud services or mobile apps.