Request HotBits (Secure Server)

Starting on July 1st, 2017, a HotBits API Key will be required to obtain radioactively-generated random data from HotBits. Please request an API key to preserve your access. When you receive your API key you can use it immediately on the new request page.

Generate random bytes (maximum 2048).





password(s) of


This page requests HotBits using the HTTPS protocol to encrypt the request for HotBits and the random data returned to you. This reduces the risk of your request being diverted to another site (because the request is encrypted with Fourmilab's certificate), and/or the random data being intercepted on its way to you.

HotBits Main Page

How HotBits Works

HotBits Hardware Description

Statistical Tests of HotBits Data

by John Walker