OTP Code Generator — Free Online Tool

Generate real RFC 6238 TOTP codes that match Google Authenticator from a Base32 secret. OTP Code Generator is a free online tool from the ToolsRift Hash & Crypto Tools collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.

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How to use OTP Code Generator

Paste your Base32 secret and the current 6-digit code appears, refreshing every 30 seconds exactly like an authenticator app.

Frequently asked questions

What is TOTP?

Time-based One-Time Password (RFC 6238) derives a 6-digit code from a shared secret and the current time, changing every 30 seconds.

Will these codes match my authenticator?

Yes — for the same Base32 secret the codes match Google Authenticator, Authy and similar apps.

Is my secret sent anywhere?

No — codes are computed locally with HMAC-SHA1 and the secret never leaves your browser.

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