Password quality checker,password quality tester,password strength

Welcome to free password quality checker tool. Password quality check showing several of different criterions for demonstrate password quality.
One of most famous criterion is a password entropy. Complicated passwords requiring a wide character set are a pain for users, yet simple passwords with long string lengths aren't entirely good enough. The best passwords are those that make good use of both string length and password entropy. Password entropy(called as password bits legnth) is the amount of variation of characters in the password.
Password strength is a measurement of the effectiveness of a password in resisting guessing and brute-force attacks. Specifically, it estimates how many trials an attacker who does not have direct access to the password would need, on average, to correctly guess it. There are many ways of calculate it, but as usual - strength of a password is a function of length, complexity, and randomness.
Random passwords consist of a string of symbols of specified length taken from some set of symbols using a random selection process in which each symbol is equally likely to be selected.
Password quality tester showing password quality level of password, and password strength point, number of brute-force combinations with different chars sets and some other information. Current function of password strength determination is fully custom, so it will be useful for password analysis use our strength points and entropy bit length.