“How Secure Is My Password?” Strength Meter Open Sourced

The plugin is actually based on newer code than the current HSIMP site so it would, for example, detect that "correcthorsebatterystaple" is going to get cracked straight away.

It's also fully customisable how many calculations per second you want to assume a cracker can make. It's set to 10 billion by default, but you could set it to much higher if you wanted.

The boundaries of what counts as "ok" and "good" passwords can also be customised.

I agree with the general rule, however checking the dev tools this site doesn't actually make any calls to a server during or after you've typed your password.

The site doesn't actually send passwords anywhere. Having said that, the irony is not lost on me that a site called "How Secure Is My Password?" asks you to type your password into a site which you have no reason to trust. I didn't ever really intend for the site to become popular... but it did. Anyway, hopefully by having it as a plugin directly on websites it will avoid such problems.

It's from this post: https://xato.net/passwords/more-top-worst-passwords/

Although that's probably a bit out of date now. I might see if there's a newer version.