A Diceware passphrase generator, implemented in JavaScript, that uses the Cryptographically Secure Pseudo Random Number Generator (CSPRNG) in your browser as its source of entropy instead of rolling physical dice.

Hosted Version
https://www.rempe.us/diceware/

Important Features
All random number generation is done in your browser using window.crypto.getRandomValues()
Single page JavaScript application with no communication back to a server
Can be run locally from a Git clone, with all dependencies baked in