Password Generator

How it works

A strong password is a long, truly random one. This generator builds passwords in your browser using the cryptographic random number generator built into modern browsers (the same source security software uses), so results are unpredictable rather than pseudo-random patterns. Strength is measured in entropy bits: with a character pool of size N and a password of length L, entropy is L x log2(N). Using all four character types (94 symbols), each character adds about 6.55 bits, so a 16-character password has roughly 105 bits of entropy, far beyond brute-force reach with current hardware. Length beats complexity tricks: adding four characters does more than adding symbols to a short password, because entropy scales linearly with length but only logarithmically with pool size. The strength meter translates entropy into a simple bar and label. Practical guidance: use at least 14 to 16 characters, a unique password for every account, and a password manager to store them. Nothing you generate here is transmitted or saved; close the tab and the password exists only where you pasted it.