Websites have a responsibility to accurately inform users of password strength, both to better secure data, and to educate about users of what constitutes a good password.

Complexify aims to provide a good measure of password complexity for websites to use both for giving hints to users in the form of strength bars, and for casually enforcing a minimum complexity for security reasons.

This plugin only provides client-side validation, and should be combined with some server-side sanity checking. If you want a full-blown Complexify implementation for the server, check out the list of ports.

For more information, a demo, documentation, and the motivation behind Complexify, visit the website.

Contributions are always welcome! If you're uncertain about something, open a PR and we can discuss. Always feel free to ping me for an update on a merge, reminding me isn't rude, it's helpful.

Several people have kindly open-sourced their implementations of this algorithm in other languages:

• Mert Dümenci Complexify-Objc
• Andrey Kislyuk node-complexify
• Michael Crumley php-complexify
• Maciej Podsiedlak angular-complexify

This code is distributed under the WTFPL v2 licence.