Create strong passphrases with EFF's new random number generators! This page includes information about passwords, different wordlists, and EFF's suggested method for passphrase generation. Use the directions below with any set of dice.And now, a message from internationally renowned security...
This is really good for encrypted content such as a hard drive, password vault or gpg key
Shameless self-plug: if you want something without Cloudflare in front of it dicewa.re is nice. Keep in mind though that in general it is not recommended to rely on random number generators as their source of randomness cannot be verified.