Strong Password Generator
Generate cryptographically secure passwords with custom settings.
Password Length: 16
Character Types
Generate: 5 passwords
Click Generate Passwords to create secure passwords
About Password Security
What makes a password strong?
A strong password has length (12+ characters), complexity (upper + lower + numbers + symbols), and randomness (not based on dictionary words or personal info). Length is the most important factor — each extra character multiplies the combinations exponentially.
Password entropy and cracking time
8-character password (numbers only): cracked instantly
8-character mixed: ~5 hours with a GPU
12-character mixed: ~centuries
16-character random: beyond practical cracking
This tool generates passwords using cryptographic randomness
Password best practices
Never reuse passwords across sites
Use a password manager (Bitwarden, 1Password, KeePass)
Enable two-factor authentication (2FA) wherever possible
Passphrases (4+ random words) are strong AND memorable
Change passwords if you receive a breach notification
🔒 All calculations happen in your browser — no data is sent to any server. Results are for informational purposes only.