Generate secure passwords with customizable length and character sets.
A secure password is long, random, and uses a variety of character types. Length is the single most important factor — each additional character exponentially increases the number of possible combinations an attacker must try. A 12-character password with mixed types is significantly harder to crack than an 8-character password using only letters.
Entropy measures the unpredictability of a password in bits. It is calculated based on the size of the character pool and the length of the password. Higher entropy means more possible combinations and a stronger password. A password with 60+ bits of entropy is generally considered secure for most purposes, while 80+ bits provides very strong protection.
Yes — passwords are generated entirely in your browser using JavaScript's cryptographically secure random number generator (crypto.getRandomValues). No passwords are transmitted or stored anywhere.
For most accounts, 12–16 characters is sufficient. For highly sensitive accounts like banking or email, 20+ characters is recommended. Longer is always better.
Yes — including symbols significantly increases the size of the character pool, making brute-force attacks much harder. Just be aware that some websites restrict which symbols are allowed.