Password Generator
Generate cryptographically strong, random passwords instantly. Customize length and character sets to meet any site's requirements. Uses crypto.getRandomValues() for true randomness — nothing is sent to any server.
Why Strong Passwords Matter
A strong password is your first line of defense against unauthorized access to your accounts. According to cybersecurity research, over 80% of data breaches involve weak or reused passwords. Brute-force attacks can crack short, simple passwords in seconds, while a 16-character password with mixed character types would take billions of years to crack.
Tips for Password Security
- Never reuse passwords — if one account is compromised, attackers will try the same password on other services (credential stuffing).
- Use a password manager — tools like Bitwarden, 1Password, or KeePass securely store unique passwords for every account.
- Enable two-factor authentication (2FA) — adds a second layer of security even if your password is compromised.
- Use at least 12 characters — longer passwords are exponentially harder to crack. We recommend 16+ characters.
- Mix character types — combine uppercase, lowercase, digits, and symbols for maximum entropy.
How This Generator Works
This password generator uses the Web Crypto API's crypto.getRandomValues() method, which provides cryptographically strong random values. Unlike Math.random(), which is pseudo-random and predictable, crypto.getRandomValues() draws from the operating system's entropy source, making the generated passwords truly random and suitable for security-critical applications.
Frequently Asked Questions
Are the generated passwords stored anywhere?
No. Passwords are generated entirely in your browser and are never stored, transmitted, or logged. Once you navigate away from the page, the password exists only if you copied it.
How long should my password be?
We recommend at least 16 characters for general accounts and 20+ characters for high-security accounts (banking, email, password managers). The longer the password, the more resistant it is to brute-force attacks.
Is this better than a passphrase?
Both random passwords and passphrases (like "correct horse battery staple") are valid strategies. Random passwords offer more entropy per character, while passphrases are easier to memorize. For accounts managed by a password manager, random passwords are generally preferred.