Password Generator

Why Use a Password Generator?

Humans are poor at creating random passwords. We tend to use dictionary words, predictable patterns (like "P@ssw0rd"), and reuse passwords across sites. A password generator creates truly random strings that are resistant to dictionary attacks, pattern-based attacks, and brute force.

With data breaches exposing billions of passwords, using unique, random passwords for every account is essential. Combine this generator with a password manager to store your passwords securely.

Password Strength by Length

• 8 characters — Minimum acceptable. Can be cracked in hours to days.
• 12 characters — Good. Would take years with current hardware.
• 16 characters — Strong. Effectively uncrackable via brute force.
• 20+ characters — Very strong. Recommended for critical accounts.

These estimates assume mixed character types (uppercase, lowercase, numbers, symbols). Using only lowercase letters significantly reduces strength.

Password Security Best Practices

• Never reuse passwords — If one site is breached, all accounts with that password are compromised
• Use a password manager — Tools like Bitwarden, 1Password, or KeePass store passwords securely
• Enable 2FA — Two-factor authentication protects accounts even if the password is compromised
• Check for breaches — Use haveibeenpwned.com to check if your email appears in known data breaches

Frequently Asked Questions

Are the generated passwords truly random?

Yes. This tool uses the Web Crypto API (crypto.getRandomValues), which provides cryptographically secure random numbers. This is the same randomness source used for encryption and security protocols in your browser.

Is my generated password stored anywhere?

No. The password is generated entirely in your browser and exists only in memory until you copy it or close the page. Nothing is sent to any server or stored in any database.

How long should my password be?

At minimum 12 characters, but 16+ is recommended. Each additional character exponentially increases the time needed for a brute-force attack. A 16-character password with mixed character types would take billions of years to crack with current technology.

Should I use special characters in passwords?

Yes, when the site allows it. Including uppercase, lowercase, numbers, and symbols maximizes the character set (from 26 to 95+ possible characters per position), making brute-force attacks much harder.

How often should I change my passwords?

NIST no longer recommends periodic password changes (the old "change every 90 days" advice). Instead, use unique, strong passwords for each site with a password manager, and only change passwords if you suspect a breach.