OTP Generator - Free Online Tool | PivaBox

Generate time-based one-time passwords (TOTP) with countdown timer for 2FA

How to Use OTP Generator

1. Enter a base32-encoded secret key
2. The tool generates a 6-digit TOTP code with a 30-second countdown timer
3. Use the generated code as a two-factor authentication (2FA) token

Frequently Asked Questions

Is OTP Generator free?

Yes, PivaBox OTP Generator is completely free to use. All generation is done in your browser.

Are my secret keys uploaded to a server?

No. All TOTP code generation is done locally in your browser using HMAC-SHA1. Your secrets never leave your device.

What is TOTP and how does it work?

TOTP (Time-based One-Time Password) is a standard algorithm (RFC 6238) that generates temporary codes valid for 30 seconds. It uses HMAC-SHA1 with the current time as input. The same algorithm is used by Google Authenticator, Authy, and other 2FA apps. Each code expires after 30 seconds for security.