AUTHENTICATORTOOL

2FA Code Generator

Generate a time-based one-time password (TOTP) from an authorized secret key.

Use the secret key from an authenticator setup you are authorized to access. Spaces are ignored.

30seconds left
YOUR CURRENT CODE••• •••

Enter your secret key to begin.

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Keep your secret private.

This tool calculates codes in your browser and does not need your login credentials. The code is temporary and refreshes automatically.

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Private by design

The public generator does not save the secret key to your account or send it to our server.

Free Online 2FA Code Generator

AuthenticatorTool is a free online 2FA code generator that helps you generate time-based one-time passwords (TOTP) using a compatible Base32 secret key. Whether you need an online authenticator, a live 2FA code, or a convenient way to generate a two-factor authentication code, this tool lets you calculate temporary verification codes using configurable settings.

How to Use This 2FA Generator

  1. Enter the Base32 secret key from an authorized authenticator setup.
  2. Keep the time step at 30 seconds unless your service specifies otherwise.
  3. Choose the correct code length and algorithm for your account.
  4. Your current TOTP code appears automatically. Copy it when needed.

What Is 2FA / TOTP?

Two-factor authentication (2FA) adds an extra layer of security to your online accounts. TOTP, or Time-Based One-Time Password, generates a temporary verification code using a shared secret key and the current time. A compatible TOTP generator and authenticator app can produce matching codes when they use the same secret and settings.

Generate Live 2FA Codes Online

An online 2FA generator can be useful when you need to calculate an authenticator verification code without installing another application. The result depends on the secret key, current time, algorithm, code length, and time step. If your OTP code does not match your authenticator app, verify these settings and check that your device clock is accurate.

Protect Your Online Accounts with 2FA

Two-factor authentication can help protect email, social media, and other online accounts against unauthorized access. Use strong, unique passwords alongside additional authentication methods. Keep your recovery codes secure and never share your authenticator secret key with anyone you do not trust.

🔐 Keep Your Secret Key Private

Anyone with your authenticator secret may be able to generate codes for the associated account. Only use secret keys you are authorized to access, and avoid entering sensitive credentials into tools you do not trust.

🛡️ Your privacy matters.
This tool is intended to process your secret key in your browser without sending it to our server. Avoid using it on shared or untrusted devices. Verify the site's actual data handling before entering a sensitive production secret.

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