How to Generate Secure Passwords — Best Practices for 2026
Create uncrackable passwords with the right length, complexity, and entropy — generated locally in your browser.
Password breaches expose billions of credentials every year. The most common passwords — "123456", "password", "qwerty" — are cracked instantly. Even seemingly clever passwords like "P@ssw0rd!" appear in every attacker's dictionary. The only reliable defense is truly random, high-entropy passwords.
Entropy is the measure of password randomness, expressed in bits. A password with 40 bits of entropy can be cracked in minutes. At 60 bits, it takes years. At 80+ bits, it's computationally infeasible with current technology. Our Password Generator creates passwords with 80-128 bits of entropy by default.
Length is the single most important factor. A 16-character random password is exponentially stronger than an 8-character one — not twice as strong, but billions of times stronger. We recommend a minimum of 16 characters for important accounts and 20+ characters for critical systems.
Character variety amplifies strength. Using lowercase only (26 characters) gives you log2(26) = 4.7 bits of entropy per character. Adding uppercase doubles the pool. Adding digits and symbols expands it further. A 20-character password using all character types provides approximately 130 bits of entropy — effectively uncrackable.
For memorable passwords, passphrase mode strings together random dictionary words. "correct horse battery staple" is the classic example (though don't use that exact phrase). A 5-word passphrase from a 7,776-word dictionary provides about 64 bits of entropy — reasonable for low-value accounts. For high-value accounts, use 7+ words or switch to random character mode.
Our Password Generator uses the Web Crypto API's getRandomValues() for true cryptographic randomness. This is fundamentally different from Math.random(), which is predictable using pseudo-random number generators. Cryptographic randomness ensures each generated password is genuinely unpredictable.
Never reuse passwords across sites. A single breach that leaks your password compromises every account sharing that credential. Use a password manager (like Bitwarden, 1Password, or KeePass) to store unique passwords for each service. Our generator is designed to pair perfectly with this workflow — generate, copy, paste into your manager, done.
Two-factor authentication (2FA) adds another layer, but it doesn't excuse weak passwords. Use both: a strong unique password plus 2FA on every account that supports it. This defense-in-depth approach ensures that even if one layer fails, the other holds.