Free 2FA Code Calculator

Generate Time-based One-Time Password (TOTP) codes instantly. Works with Google Authenticator, Authy, Microsoft Authenticator, and more.

CURRENT 2FA CODE
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Time remaining: 30 seconds
Enter a valid base32 secret key to generate 2FA codes

Try Example Keys

Free 2FA Code Calculator - Generate TOTP Codes Instantly

Our free 2FA Code Calculator allows you to generate Time-based One-Time Password (TOTP) codes directly in your browser. This tool is perfect for recovering 2FA access, testing authentication setups, or as a backup when you don't have access to your authenticator app.

What is 2FA and TOTP?

Two-Factor Authentication (2FA) adds an extra layer of security to your online accounts. Instead of just a password, you also need a temporary code from an authenticator app. TOTP (Time-based One-Time Password) is the most common 2FA method, generating codes that change every 30 seconds.

Key Features of Our 2FA Code Calculator

How to Use This 2FA Code Calculator

  1. Enter your base32 secret key (from your authenticator app setup)
  2. Select your preferred code length and time period
  3. The tool will automatically generate your current 2FA code
  4. Watch the timer count down to the next code
  5. Use the copy button to quickly paste the code where needed
  6. Recent codes are saved in the history section for reference

Frequently Asked Questions

What is a base32 secret key?

A base32 secret key is a string of letters and numbers (A-Z, 2-7) used by authenticator apps to generate TOTP codes. You usually get this key when setting up 2FA for a service. It's case-insensitive and may include = padding characters.

Is this tool secure?

Yes! All calculations happen locally in your browser. We never send your secret key to any server. Your secret key stays on your device and is never transmitted over the internet.

Can I use this as a backup authenticator?

This tool can serve as an emergency backup if you lose access to your authenticator app. However, for regular use, we recommend dedicated authenticator apps like Google Authenticator, Authy, or Microsoft Authenticator.

Why isn't my code working?

Common issues include: incorrect secret key, time synchronization problems, or using the wrong algorithm. Make sure your device's clock is accurate (within 30 seconds) and that you're using the correct secret key from your 2FA setup.

What services use TOTP 2FA?

Most major services support TOTP 2FA including Google, Facebook, GitHub, Dropbox, Microsoft, Amazon AWS, and many more. Look for "authenticator app" or "TOTP" options in your account security settings.

How do I get my secret key?

When setting up 2FA on a website, you'll usually see a QR code and a text-based secret key. You can copy this secret key and use it here. Always store backup codes in a secure place.