测试密码强度的网站

How Secure Is My Password http://howsecureismypassword.net/

Strength Test http://rumkin.com/tools/password/passchk.php

Microsoft Safety And Security Center https://www.microsoft.com/security/pc-security/password-checker.aspx

How Big Is Your Haystack https://www.grc.com/haystack.htm

以下几个网站的效果不是很理想，因为abc-123或者123!@#qwe这样的密码，他们也认为是强度很高的密码，有一定的误导性。

The Password Meter http://www.passwordmeter.com/

Test Your Password http://www.testyourpassword.com/

Yet Another Password Meter http://www.yetanotherpasswordmeter.com/