Strong Password Generator

Why Strong Passwords Matter in 2025

In an era of increasing cyber threats, weak passwords are one of the biggest vulnerabilities. Over 80% of data breaches involve compromised credentials. A strong password generator like this one helps you create passwords that are virtually impossible to crack through brute force or guessing.

How Secure Password Generation Works

This tool uses your browser's built-in cryptographically secure random number generator (crypto.getRandomValues()) to ensure true randomness. Unlike pseudo-random methods, this is suitable for security-sensitive applications.

The process:

1. You select desired length (8–64 characters) and character types
2. The generator builds a character pool from your choices
3. It guarantees at least one character from each selected type
4. Remaining characters are randomly selected and shuffled
5. Final password has high entropy and no predictable patterns

Understanding Password Entropy & Strength

Password strength is measured in bits of entropy – the higher, the better:

• Less than 60 bits: Weak (crackable in hours/days)
• 60–90 bits: Moderate (good for most accounts)
• 90–128+ bits: Strong (resistant to brute force for decades)

A 16-character password using all character types typically achieves 100+ bits of entropy – far stronger than "Password123!"

Best Practices for Password Security

1. Use unique passwords for every account
2. Enable 2FA/MFA wherever available
3. Use a reputable password manager (Bitwarden, 1Password, etc.)
4. Avoid common patterns like keyboard walks or substitutions
5. Change passwords immediately after known breaches

Passphrases vs Random Passwords

For accounts you must memorize, consider passphrases (4–6 random words). They're easier to remember while still offering good entropy. For everything else, use this generator and store in a password manager.

This strong password generator runs entirely in your browser – your passwords are never transmitted or stored. Privacy and security by design.