How to Create a Strong Password (and Why Length Beats Complexity)

Passwords remain the front door to your digital life, yet most people still use weak, reused, or predictable ones. The good news is that creating strong passwords is easier than the old advice suggested. Modern security research has overturned some long-held myths, and understanding the real principles will keep your accounts far safer.

What makes a password strong?

The strength of a password comes down to entropy, a measure of how unpredictable it is. Entropy grows with both the size of the character set you use and, crucially, the length of the password. A longer password has exponentially more possible combinations, which is what defeats automated guessing attacks. This is why a long passphrase can be stronger than a short string of random symbols.

Why length beats complexity

For years we were told to use short passwords crammed with uppercase letters, numbers, and symbols. The problem is that these are hard for humans to remember but easy for computers to crack, because they are still short. Adding length increases the number of guesses required far more dramatically than adding a single symbol. A twelve-character password is vastly stronger than an eight-character one, even if the shorter one has more symbol variety. Aim for at least sixteen characters when security matters.

The power of passphrases

One memorable approach is the passphrase: a string of several random words. Because it is long, it has high entropy, and because it is made of words, you can actually remember it. The key is randomness. Words chosen at random are strong, while a famous quote or common phrase is weak because attackers include these in their guessing lists. If you prefer a fully random string, a password generator removes all guesswork.

Never reuse passwords

Even a strong password becomes a liability if you reuse it. When one service suffers a data breach, attackers take the leaked credentials and try them on other sites, a technique called credential stuffing. If you used the same password elsewhere, those accounts fall too. Every account should have its own unique password, which is impossible to manage by memory alone.

Use a password manager

The practical solution to unique, long passwords everywhere is a password manager. It generates and stores strong passwords for every account, filling them in automatically, so you only need to remember one strong master password. This eliminates reuse, defeats phishing that relies on look-alike sites, and makes strong security effortless.

Enable two-factor authentication

Even the strongest password can be phished or leaked, which is why two-factor authentication is essential for important accounts. By requiring a second factor, such as a code from an app or a hardware key, you ensure that a stolen password alone is not enough to break in. Enable it everywhere it is offered, prioritising email, banking, and social accounts.

Generating passwords safely

When you need a new password quickly, a generator is the fastest route to strength. A good generator uses cryptographically secure randomness, which is exactly what our Password Generator does using your browser's built-in secure random function. Because it runs entirely in your browser, the generated password never travels over the network. Choose a length of sixteen or more, include a mix of character types, and paste the result straight into your password manager.

Conclusion

Strong passwords are long, unique, and random. Favor length over fiddly complexity, never reuse a password, lean on a password manager to handle the rest, and add two-factor authentication for your most important accounts. Follow these principles and you will be safer than the vast majority of internet users, with far less effort than the old rules demanded.