TOTP Authenticator

Free online TOTP (RFC 6238) authenticator with countdown.

TOTP TOTP Authenticator Interactive Tool

Secret (Base32)

Digits

One-time code

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30s

Paste a Base32 secret and the code refreshes every 30s

The TOTP Authenticator implements RFC 6238 in your browser: paste a Base32 secret (the same kind used by Google Authenticator, Authy and 2FA services) and the current 6-8 digit code appears immediately, refreshing every 30 seconds with a live countdown bar.

A random-secret button creates a fresh 20-character Base32 key for testing. Everything - including the HMAC-SHA1 computation - runs locally, so your secrets never leave the device.