Two-factor authentication

Stronger security for every account you own.

Authenticator generates secure one-time passwords, backs them up with end-to-end encryption, and locks them behind your fingerprint — so a stolen password is never enough.

Download on Google Play See how it works

Free to use · No account required · Works offline

5M+

Active installs

4.8★

Average rating

256-bit

AES encryption
Your codes
Refreshes every 30 seconds
G
Google
481 920
M
Microsoft
305 174
D
Discord
762 038

Works with the services you already use

Capabilities

Everything you need to stay protected

A focused, privacy-first authenticator built around the security standards you can trust.

AES-256 encryption

Your secret keys are encrypted on-device and never stored or transmitted in plain text.

One-scan setup

Add any account in seconds by scanning its QR code — no manual entry, no friction.

Biometric lock

Gate your codes behind fingerprint or Face ID so only you can ever view them.

Encrypted backup

Switch phones without losing a single token. Restore your encrypted vault in one tap.

Fully offline

Codes are generated locally with the TOTP standard — no internet connection required.

Search & organize

Find any account instantly and keep hundreds of tokens neatly sorted into folders.

Getting started

Set up protection in three steps

From install to secured in under a minute — no sign-up, no complexity.

1

Install the app

Download Authenticator from Google Play and open it — no registration needed.

2

Scan a QR code

In any service's security settings, choose “Authenticator app” and scan the code shown.

3

Sign in securely

Enter the rolling 6-digit code at login. That's your second layer of defence in place.

Authenticator app interface
The experience

Clear, fast, and built to get out of your way

A focused interface that surfaces the right code at the right moment — nothing more, nothing less.

  • Tap to copyCodes land on your clipboard in one touch and auto-clear after use.
  • Privacy modeHide codes from view until you need them, perfect for shared spaces.
  • Standard TOTPCompatible with every service that supports authenticator apps.
  • No trackingWe don't sell data or show ads inside your secure vault.
Explore all features
Support

Frequently asked questions

Everything you might want to know before getting started.

It adds a second layer of security to your logins. Alongside your password, you enter a short code that the app generates fresh every 30 seconds — so even a stolen password isn't enough for an attacker to get in.

Yes. Codes are generated locally on your device using the standard TOTP algorithm, so you can sign in securely even with no signal or Wi-Fi.

Enable encrypted backup and your vault is safely stored. On a new device, restore everything in a single tap — no token left behind.

Any site or app that supports authenticator-based 2FA, including Google, Microsoft, Instagram, Amazon, GitHub and Discord. If it can show a QR code, it works.

Completely. Your secrets are encrypted on-device with AES-256, your codes are never transmitted in plain text, and we never sell your data.

Secure your accounts today

Join millions who trust Authenticator to protect what matters most. Free, fast, and private.

Download on Google Play Learn more