How to Create a Strong Password

A strong password is your first line of defense for everything from your email to your bank to your router. Yet most advice about them is outdated, pushing complicated rules that make passwords hard to remember without actually making them much safer. This guide cuts through that with what current security thinking says really matters, and shows you how to create passwords that are both strong and manageable.

What Actually Makes a Password Strong

Three things determine how strong a password is, and it helps to know them in order of importance.

Length is the single most important factor

Every extra character multiplies the number of possibilities an attacker has to try, so a long password is dramatically harder to crack than a short one, even a short one full of symbols. Aim for at least 12 characters, and 16 or more is better.

Uniqueness matters just as much

A strong password is worthless if you reuse it. When one site suffers a data breach, attackers try the leaked password on your other accounts. A unique password for every account contains the damage to that one site.

Unpredictability is the third piece

Your password should not be guessable from things known about you or from common patterns. Avoid your name, birthday, pet’s name, and dictionary words used alone.

The Best Way to Create One: A Passphrase

The most practical way to get a long, strong, and memorable password is a passphrase: a string of several random, unrelated words. Four or five random words produce a password that is long enough to be very hard to crack, yet far easier to remember than a jumble of symbols.

The key is that the words must be random and unrelated, not a phrase from a song or a common saying. Something like “copper-lantern-galaxy-pickle” is long, memorable, and strong, while “to be or not to be” is long but weak, because it is a well-known phrase. You can add a number or symbol if a site requires it, but the length from stringing words together is what does the heavy lifting.

The Easiest Way: Let a Password Manager Do It

For accounts you do not need to type by hand often, the simplest approach is to let a password manager generate and store a long, completely random password for you. A password manager creates something like a 20-character random string, saves it, and fills it in automatically when you log in, so you never have to remember or type it.

This solves the hardest problem in password security, which is having a different strong password for every single account. You remember one strong master password for the manager, and it handles all the rest. Reputable options include both free and paid tools, and this is the approach most security professionals actually use.

What to Avoid

Steer clear of these, which attackers try first:

• Common passwords like 123456, password, and qwerty, which are the first guesses in any attack.
• Personal information such as your name, birthday, address, or pet’s name, which can be found or guessed.
• Single dictionary words, even long ones, since attackers run through whole dictionaries automatically.
• Predictable substitutions like changing a to @ or o to 0, as in P@ssw0rd. Attackers know these tricks, so they add almost no strength.
• Keyboard patterns like qwerty or 12345, which are among the first things tried.
• Reusing passwords across accounts, which turns one breach into many.

Two Myths Worth Dropping

Some old rules do more harm than good, and current guidance has moved away from them.

The myth of forced complexity

The old advice to cram in uppercase, lowercase, numbers, and symbols led people to create passwords like “P@ss1!” that are short, hard to remember, and not actually strong. A longer passphrase beats a short complex string every time. Complexity helps a little, but length helps far more.

The myth of frequent changing

Being forced to change your password every few months tends to make security worse, not better, because people make small predictable tweaks like adding a 1 or a 2. Current guidance is to change a password when there is a reason to, such as a breach or a suspicion it was exposed, rather than on an arbitrary schedule.

Add Two-Factor Authentication

Even the strongest password is stronger with a second layer. Two-factor authentication requires a second step to log in, usually a code from an app or a prompt on your phone, on top of your password. That means even if your password is somehow stolen, an attacker still cannot get in without that second factor. Turn it on for your important accounts, especially email, banking, and anything financial. It is one of the simplest ways to keep your internet privacy safe.

A Look Ahead: Passkeys

The direction things are heading is passwordless. Passkeys are a newer technology that lets you sign in using your device’s fingerprint, face, or PIN instead of a typed password, and they cannot be phished or reused across sites the way passwords can. More and more services support them. They will not replace passwords everywhere overnight, but where a passkey is offered, it is worth using, since it sidesteps most password weaknesses entirely.

Where This Matters Most: Your Router

The advice here applies directly to your home network. Two passwords protect your router, and both deserve the treatment above. The admin password logs you in to the router’s settings, and the Wi-Fi password lets devices join the network. Default logins like admin/admin are published in public databases, so replacing them with strong, unique passwords is a core part of securing your Wi-Fi network. When you are ready, our guides on changing your Wi-Fi password and recovering your router’s password walk through the steps.

Conclusion

Creating a strong password comes down to making it long, unique, and unpredictable, and the easiest way to do that is a passphrase of several random words or a password generated by a password manager. Skip the outdated rules about cramming in symbols and changing passwords every month, and focus on length and not reusing passwords instead. Add two-factor authentication to your important accounts, and where passkeys are offered, take advantage of them. Those few habits put your accounts far out of reach of the attacks that catch most people.