Basic password generator. Larger feed base than most other generators (and thus higher entropy) and let's you choose which character composition to use. Quotes are for example confusing to put in a session secret on the server, so exclude chars.ambigious. The PRNG can definitely be improved, as could the character collection. Right now, all char…

gistfile1.js

var chars = {
  numbers: "123456789",
  letters: "qwertyupasdfghjkzxcvbnm",
  upper: "qwertyupasdfghjkzxcvbnm".toUpperCase(),
  special: "!#€%&/@\\(){}[]=?`´^¨*,.;:-_><§°",
  foreign: "ñõìàéèëêãâîïÇÉçéûüåäöæø",
  foreignUpper: "ñõìàéèëêãâîïÇÉçéûüåäöæø".toUpperCase(),
  ambigious: "”\"'’“iloILO0 ",
  insane: "¡¥¢‰¶≠¿•˝√‡˜ˆŒ∏»«ˇ⁄—·◊∑∆∫¯˘¬ºflØÆ⁄ˇ≥Ω鮆µüıœπ˙ß∂ƒ¸˛ªfi÷≈ç‹›‘‚…"
};

function generatePassword (length, collection) {
  var result = "", i;

  collection = collection.map(function (item) {
    return chars[item];
  }).join('');

  for(i = length; i--;) {
    result += collection[Math.floor(Math.random()*collection.length)];
  }

  return result;
}

// Usage example
console.log(generatePassword(30, ['numbers', 'letters', 'upper', 'special', 'foreign', 'foreignUpper', 'insane']));

Rebuilt into a module here! https://github.com/ahultgren/node-password-generator