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In an era where data breaches expose billions of credentials annually, a strong, unique password is your first and most critical line of defence. Our password generator creates cryptographically random passwords of any length, using any combination of uppercase letters, lowercase letters, numbers and special symbols. Unlike human-chosen passwords that predictably lean on familiar words or dates, algorithmically generated passwords contain no exploitable patterns whatsoever.

Generating a strong password is only half the battle — knowing its strength is equally important. After generating your password here, use our Password Strength Checker to estimate exactly how long it would take a modern brute-force attack to crack it, measured in seconds, years or even millions of years. The difference between an 8-character and a 16-character random password is astronomical.

Security experts universally recommend using a different password for every account and storing them in a password manager. Never reuse passwords across services — if one service is breached, all your accounts using the same password become immediately vulnerable. Our Base64 Encoder can also be useful for developers needing to encode sensitive credentials for API authentication flows.

What makes a password truly strong?

The NIST Special Publication 800-63B (2017) fundamentally changed how security professionals think about password strength. The old paradigm — mandatory complexity rules like "must include uppercase, number and symbol" — turns out to be counterproductive because it leads to predictable patterns (Password1!, Summer2024!). NIST's updated guidance: length matters more than complexity. A 20-character passphrase of random words ("coffee-mountain-river-lamp-27") is far stronger than an 8-character "complex" password and vastly easier to remember. Our generator uses a cryptographically secure random number generator (CSPRNG) — not JavaScript's regular Math.random() which is not cryptographically secure — to generate genuinely unpredictable passwords.

Why you need a different password for every site

Data breaches expose billions of credentials annually. When a site is breached, attackers immediately use the stolen username/password pairs to attempt logins on every major service — a technique called credential stuffing. If you reuse passwords, a breach at one minor site can unlock your email, banking and social accounts. Use a password manager (Bitwarden, 1Password, KeePass) to generate and store unique passwords for every service. After generating your password here, check its strength with our Password Strength Checker.