Generate secure random passwords with customizable length, character sets, and complexity. Create strong passwords that meet security requirements and resist brute-force attacks.
A strong password is your first line of defense against unauthorized access. This generator creates cryptographically random passwords using customizable character sets including uppercase, lowercase, numbers, and special characters. The generated passwords have high entropy, making them resistant to dictionary attacks, brute force, and rainbow table attacks.
Password Entropy = log2(Character Set Size^Password Length) bitsPassword strength is measured in bits of entropy. A 16-character password using all 94 printable ASCII characters has log2(94^16) ≈ 105 bits of entropy. NIST recommends a minimum of 80 bits of entropy for strong passwords, which requires at least 13 characters with a full character set.
| Input | Output |
|---|---|
| 16 characters, all character types | K9#mP2$vL5@nQ8&w |
| 20 characters, alphanumeric only | R7tKm3Np9Qw2Xv8Lj5Bn |
| 12 characters, with symbols | 3&kM#9pL@2wQ |