Generate two-factor authentication codes instantly — no app, no login, no data collection. Works with Google, Facebook, Binance, and 1000+ services.
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Two-factor authentication (2FA) is a security method that requires two separate forms of verification before granting access to an account. The first factor is typically something you know — your password. The second factor is something you have — a time-sensitive one-time code generated by an authenticator app or tool.
Even if a hacker steals your password through phishing, a data breach, or keylogging, they cannot access your account without the second factor. This makes 2FA one of the most effective defenses against unauthorized account access.
Major platforms including Google, Facebook, Twitter/X, GitHub, Amazon, all major cryptocurrency exchanges, and thousands of other services support 2FA. Security experts universally recommend enabling it on every account that offers the option.
There are two main one-time password standards used in 2FA systems:
| Feature | TOTP Time-Based | HOTP Counter-Based |
|---|---|---|
| Standard | RFC 6238 | RFC 4226 |
| Code Changes | Every 30 seconds | After each use |
| Clock Sync Needed | Yes | No |
| Common In | Google Authenticator, Authy, Microsoft Authenticator | Hardware tokens, some legacy systems |
| Used By This Tool | ✅ Yes | ❌ No |
A 2019 Microsoft study showed that accounts with multi-factor authentication enabled are 99.9% less likely to be compromised. With billions of stolen credentials circulating on the dark web, a password alone is no longer sufficient protection.
Enable 2FA on these accounts as a priority: your primary email, social media accounts, banking and financial apps, cryptocurrency exchange accounts, cloud storage (Google Drive, Dropbox), and your domain registrar or web hosting.
Yes. This tool is entirely client-side — it runs in your browser using JavaScript and the Web Crypto API. No data is sent to any server. You can verify this by opening your browser's developer tools, going to the Network tab, and observing that no requests are made when you type a key. Your secret key never leaves your device.
The most common cause is a clock synchronization issue. TOTP codes are time-based, so your device clock must be accurate. Check: (1) Your system clock is set to automatic sync. (2) Your timezone is correct. (3) You're entering the code before the countdown reaches zero. (4) The secret key has no extra spaces or padding characters.
For generating codes, yes — this tool uses the same RFC 6238 TOTP algorithm as Google Authenticator and Authy. The 6-digit codes it generates will be identical. However, a dedicated mobile app is recommended for everyday use since it works offline and is always accessible on your phone. This tool is ideal as a browser-based backup or for managing multiple accounts on a desktop.
Yes — Binance, Coinbase, Kraken, Bybit, OKX, KuCoin, and most other major crypto platforms use standard TOTP for 2FA. This tool is fully compatible as long as you use the correct secret key from that platform.
Recovery depends on the platform. Most services offer recovery through verified email, phone number, or identity verification. This process can be slow. Prevention is critical: when enabling 2FA, always save the backup codes provided by the platform, and store your secret key in an encrypted password manager (Bitwarden, 1Password, or KeePass).
Yes. Click the "Add Another Account" button to add as many 2FA accounts as you need. Each one generates its own independent code refreshing every 30 seconds. You can also pass multiple keys in the URL separated by commas for quick bookmarked access.