OTP code generator

Security

Generate and validate time-based OTP (one time password) for multi-factor authentication.

Generate and validate time‑based OTP (one time password) for multi‑factor authentication.

Secret

Secret in hexadecimal

DigitsPeriod (s)

IssuerAccount

Previous

000000

Current OTP

000000

Next

000000

Next in 30s

Epoch

Iteration (count)

Padded hex

Advanced: compute OTP for a given counter (HOTP)