Google Authenticator

Two-step codes in one place

Google Authenticator generates temporary verification codes for accounts protected by two-step authentication. It is designed for people who want a separate security check beyond a password, without relying on text messages or a constant internet connection. The app supports time-based and counter-based codes, so it works with a broad range of services that use these standards.

Useful when setting up or changing phones

New accounts can usually be added by scanning a QR code, which avoids typing a long setup key by hand. Codes are generated on the device and can remain available when mobile data or Wi-Fi is not, making the app practical during travel or in areas with weak reception. Google Authenticator also supports transferring an account collection to another device through QR codes.

Backup and everyday access

When codes are synced with a Google Account, losing or replacing a phone does not necessarily mean rebuilding every two-step login from scratch. The main screen keeps the experience focused: account entries and their current codes are presented for quick reference, with a countdown indicating when a code is about to change. That straightforward layout suits users who want a dedicated authenticator rather than a broader password manager.

At a glance

• Developer: Google LLC
• Category: Tools
• Rating: 3.85 from 640,343 reviews
• Installs: 100,000,000+