Password Generator

How to Use

Passwords are automatically regenerated when you change any setting. Use the copy button to copy generated passwords to your clipboard.

Strength Calculation

Password strength is measured by entropy (in bits). Higher entropy means more resistance to brute-force attacks.

Formula: Entropy = Length × log₂(Charset Size)

• Very Weak: below 40 bits
• Weak: 40–59 bits
• Fair: 60–79 bits
• Strong: 80–99 bits
• Very Strong: 100 bits or more

Recommended Practices

• Use 16+ characters (per NIST SP 800-63B guidelines)
• Include all four character types: uppercase, lowercase, numbers, and symbols
• Avoid dictionary words and personal information (names, birthdays)
• Use a unique password for each service
• Consider using a password manager

Security

This tool uses a cryptographically secure random number generator (crypto.getRandomValues). Generated passwords are never sent to a server — all processing happens in your browser.