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Are you sure your online passwords meet minimum requirements? If you use the same password for all web accounts, like many of us do, you better make sure that it is strong. Password Meter is a web-based password checker that can help you with that. Not only you it can test your existing password for strength but also provide guidelines for creating stronger passwords. It calculates positive and negative factors using its own weighting algorithms and comes up with the number that corresponds to potential strength of your password.

Password Meter - Password Guidelines and Strength Meter


  • Generate strong passwords.
  • Weighing algorithm: Calculates the strength of your password based on a number of factors.
  • Detailed table showing password guidelines and strength affecting factors.
  • No registration or email required

Check out PasswordMeter @ [ [NO LONGER WORKS] ]

  1. ibitlab
    June 5, 2008 at 3:28 am

    Generate and keep strong passwords by

  2. bob
    March 22, 2008 at 11:59 am

    I find it disappointing that the max characters for the checker is 16, especially as it advocates strong passwords, yet it limits you to 16 characters. Since i could not fully evaluate my 23 character password & the 16 it limits me to came up strongly (%), I will assume that it is very strong. I think i will firebug the input box and see if i can test my 23 characters.

  3. Isaac
    March 20, 2008 at 10:40 am

    This tool assumes that your passwords are something you create, coming up with a random-looking sequence that's easy for you to remember and hard for others to guess.

    I guess most people people do it that way (I used to: my Yahoo password was "9timyp" (random digit, and "this is my Yahoo password") but I think that practice is obsolete. Too many passwords to remember (and you don't want to reuse them!) and some passwords need to change regularly.

    The only practical approach is to never make up passwords yourself. Instead, use a software tool like Roboform, which stores your passwords in an (optionally encrypted) database and generates new passwords upon request. When you generate a password, you can choose the different character sets used and the length of the password. This determines the bit strength of the password.

    Many passwords generated this way do poorly with Password Meter. Why? Even though they're totally random, they often violate the rules that Password Meter lays down, such as repeated letters and not having symbols. (Even if you specify symbols, there's a random chance that Roboform won't generate them for a given password.) These rules might apply to human generated passwords (though I'm not sure how using a letter more than once is supposed to make a password more guessable), but are totally inapplicable to software generated passwords.

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