The password.es Chrome extension, including the password generation javascript. All password generation happens in the browser.
The extension can be installed from https://chrome.google.com/webstore/detail/passwordes-chrome/goamldkmlbmnbheldgfekanipnfefkgp
This extension also has a sibling website, found at https://password.es/chrome, whose source can be found at https://github.com/dcarrero/password.es-webninja
Based in the original passwds.ninja for web and chrome.