ToolRun
🔒

Password Generator

Generate strong, random passwords with customizable length, character types, and strength indicators.

Password Generator

Generate strong, random passwords with customizable options.

16
8128

About the Password Generator

The Password Generator creates cryptographically random passwords using your browser's built-in secure random number generator (crypto.getRandomValues). Every password generated is unique, unpredictable, and never stored or transmitted.

What Makes a Strong Password

A strong password has three key properties: length, complexity, and uniqueness. Security experts recommend passwords of at least 12 characters that include a mix of uppercase letters, lowercase letters, numbers, and special symbols. Our generator makes it easy to create passwords meeting these criteria.

Password Length Recommendations

  • 8 characters: Minimum acceptable length. Can be cracked in hours with modern hardware.
  • 12 characters: Good for most accounts. Estimated centuries to brute-force with current technology.
  • 16 characters: Recommended for important accounts like email, banking, and cloud services.
  • 20+ characters: Excellent for master passwords and high-security applications.

Password Security Best Practices

  • Use a unique password for every account
  • Never reuse passwords across different services
  • Use a password manager to store your passwords securely
  • Enable two-factor authentication (2FA) whenever available
  • Change passwords immediately if a service reports a data breach
  • Avoid dictionary words, personal information, and common patterns

How Passwords Are Cracked

Attackers use several methods: brute-force (trying every combination), dictionary attacks (trying common words and variations), rainbow tables (precomputed hash lookups), and credential stuffing (using leaked passwords from other breaches). Long, random passwords with mixed character types defend against all of these methods.

Frequently Asked Questions

Are the generated passwords truly random?
Yes. The generator uses the Web Crypto API (crypto.getRandomValues), which provides cryptographically secure pseudo-random numbers. This is the same randomness source used by security-critical applications and is suitable for generating passwords.
Are my generated passwords stored anywhere?
No. All password generation happens entirely in your browser. No passwords, settings, or any data are ever sent to a server. Once you navigate away from the page, the generated passwords exist only if you have copied them.
How long should my password be?
We recommend at least 16 characters for important accounts. Each additional character exponentially increases the number of possible combinations an attacker would need to try. A 16-character password with mixed character types would take billions of years to brute-force with current technology.
What does "exclude similar characters" mean?
Similar characters are those that look alike in many fonts, such as l (lowercase L) and 1 (one), O (uppercase O) and 0 (zero), I (uppercase I) and l (lowercase L). Excluding them makes passwords easier to read and type manually without introducing errors.

Related Tools