TOTP (Time-based One-Time Password) is an algorithm that generates a temporary password based on the current time and a shared secret key. It's defined in RFC 6238 and commonly used in two-factor authentication by apps like Google Authenticator and Authy.

What is the difference between TOTP and HOTP?

TOTP is time-based and generates codes that expire every 30 seconds (typically), while HOTP is counter-based and generates codes based on an incrementing counter. TOTP is synchronized with time servers, while HOTP requires manual counter synchronization between client and server.

Is this TOTP generator compatible with Google Authenticator?

Yes! This tool generates QR codes and OTP URIs that are fully compatible with Google Authenticator, Authy, Microsoft Authenticator, and any other RFC 6238/4226 compliant authenticator app.

How secure is TOTP for two-factor authentication?

TOTP is very secure when implemented correctly. It uses cryptographic hash functions (SHA-1, SHA-256, SHA-512) and time-based codes that expire quickly. The secret key should be kept secure and never shared. This tool processes everything client-side, so your secret key never leaves your browser.

Can I use this tool offline?

Yes, once the page is loaded, all TOTP/HOTP generation happens in your browser using JavaScript. No data is sent to any server, making it safe for offline use and ensuring your secret keys remain private.

TOTP HOTP Generator - Free 2FA Two Factor Authentication OTP QR Code Generator Online | Google Authenticator Compatible

TOTP HOTP Generator - Free 2FA Two Factor Authentication OTP QR Code Generator Online | Google Authenticator Compatible | 8gwifi.org

Generate TOTP/HOTP codes for 2FA. Create QR codes for Google Authenticator, Authy, or other authenticator apps.

Authentication Mode:

Configuration

Secret Key (Base32):

Issuer (Service Name):

Account Name (Email/Username):

Hash Algorithm:

Code Length (Digits):

Time Period (seconds):

Counter Value:

QR Code

Scan with authenticator app

OTP URI

Generated OTP Code

Time Synchronized

------

--s remaining

Codes Generated

Validations

Successful

Validate OTP Code

Backup & Export

How It Works ▾

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TOTP/HOTP Generator

Configuration

QR Code

OTP URI

Generated OTP Code

Validate OTP Code

Backup & Export

How It Works ▾

TOTP (Time-based)

HOTP (Counter-based)

Security Tips

Related Tools

Support This Free Tool

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TOTP/HOTP Generator

Configuration

QR Code

OTP URI

Generated OTP Code

Validate OTP Code

Backup & Export

How It Works ▾

TOTP (Time-based)

HOTP (Counter-based)

Security Tips

Related Tools

Support This Free Tool

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