I just use Diceware: <a href="https:&#x2F;&#x2F;qrmn.uk&#x2F;dwr&#x2F;" rel="nofollow">https:&#x2F;&#x2F;qrmn.uk&#x2F;dwr&#x2F;</a><p>(With thanks to Alyssa Rowan for the CSPRNG design. Public domain - feel free to copy it.)<p>For really important stuff, actual dice just to make sure.