Password Generator

Generate secure, random passwords. Customize length, characters, and get strength analysis. Free password generator with entropy calculation.

Password Strength

Strength

Generate

Entropy0 bits
Crack Time-
Characters0

Your Password

Click generate to create a password

Password Options

464

Character Set

Character Pool Size

88

Possible Combinations

1.3e+16

Uppercase: ABCDEFGHIJKLMNOPQRSTUVWXYZ

Lowercase: abcdefghijklmnopqrstuvwxyz

Numbers: 0123456789

Symbols: !@#$%^&*()_+-=[]{}|;:,.<>?

Security Tips

  • •Use a unique password for every account - never reuse passwords
  • •Store passwords in a password manager, not in browsers or documents
  • •Enable two-factor authentication (2FA) wherever possible
  • •Longer passwords are more secure than complex short ones
  • •Change passwords immediately if a service reports a breach

Password Strength

Strength

Generate

Entropy0 bits
Crack Time-
Characters0

Quick Answer

A strong password should be at least 12-16 characters with a mix of uppercase, lowercase, numbers, and symbols. Our generator creates cryptographically secure random passwords. Password strength is measured by entropy (bits): 80+ bits is strong, 128+ is very strong. Each additional character exponentially increases security. Never reuse passwords across accounts.

Key Facts

  • Strong passwords: 12-16+ characters with mixed character types
  • Password entropy formula: log2(charset_size^length) bits
  • 80+ bits entropy = strong; 128+ bits = very strong
  • Each additional character multiplies crack time exponentially
  • Use a unique password for every account
  • Password managers (1Password, Bitwarden) securely store passwords
  • Two-factor authentication (2FA) adds crucial extra security
  • Passphrases (4-5 random words) can be as secure as random passwords

Frequently Asked Questions

A strong password is: at least 12-16 characters long, uses a mix of uppercase, lowercase, numbers, and symbols, avoids common words or patterns, unique for each account. Longer passwords are exponentially harder to crack than complex but short ones.
Minimum 12 characters for important accounts, ideally 16+. Each additional character multiplies the time to crack. A 12-character password with all character types takes millions of years to crack; an 8-character password takes hours.
Yes! Password managers let you use unique, complex passwords for every account without memorizing them. They're more secure than reusing passwords or using predictable patterns. Popular options: 1Password, Bitwarden, LastPass, Dashlane.
Entropy measures password randomness in bits. Higher entropy = harder to crack. Calculated as log2(charset_size^length). A 12-character password using 95 characters has ~79 bits of entropy. 80+ bits is considered strong.
Both can be secure. Random passwords are more compact for the same entropy. Passphrases (4-5 random words) are easier to remember but longer. "correct-horse-battery-staple" has similar security to a 10-character random password but is easier to type.