POMjs is a random password generator in HTML and pure Javascript. It can be customized by modifying the sources. There's really nothing magic going on here, but it works and is somewhat responsive. The goal was to make something small, useful, and reasonably free from dependencies.
Download the distribution or clone the repo. Files and folders should be placed in your web root, or another folder accessible to your web server. All references to CSS and Javascript use relative paths.
There may be references to "Öppet Moln" ("Open Cloud"), which is a Swedish site run by the author of POMjs, oppetmoln.se, to promote open source solutions for general use. You can, of course, delete such references.
I'd appreciate a mention on whatever website you use this one, and a link to the original repo, but it's not required.