How to Create a Strong Password (That You Can Actually Remember)

Most advice about strong passwords is stuck in 2005. You have probably been told to mix uppercase, lowercase, numbers, and symbols into something like "P@ssw0rd!" — and then to change it every 90 days. That advice is not just annoying, it is actively counterproductive. It produces passwords that are hard for humans to remember and easy for computers to guess.

Let us fix that. A genuinely strong password comes down to one property above all others: entropy, which is just a measure of how unpredictable it is. The more unpredictable, the more guesses an attacker needs. Everything below is about maximizing unpredictability while keeping the result usable.

Length matters more than symbols

Each character you add to a password multiplies the number of possible combinations. Adding a single symbol to a short password barely moves the needle, but adding four more random characters can make it thousands of times harder to crack.

A 16-character password made of lowercase words is dramatically stronger than an 8-character password packed with symbols. Attackers use software that tries billions of guesses per second, and they start with every common substitution you can think of — "a" becomes "@", "s" becomes "5", "o" becomes "0". Those tricks fool humans, not cracking rigs.

The takeaway: aim for at least 16 characters. If a site lets you go longer, go longer.

Use a passphrase, not a password

The easiest way to get length without memorizing gibberish is a passphrase: four to six random, unrelated words strung together. Something like "stapler-violet-canyon-muffin" is long, easy to picture, and far stronger than "Tr0ub4dor&3".

The key word is random. "correct horse battery staple" only works if the words are chosen unpredictably, not picked by you because they feel clever. Our passphrase generator does this for you, and you can sanity-check any password with the password strength checker.

We dig deeper into this in password vs passphrase.

Make every password unique

A strong password is worthless if you reuse it. When one site gets breached — and sites get breached constantly — attackers take the leaked email-and-password pairs and try them everywhere else. This is called credential stuffing, and it is one of the most common ways accounts get hijacked.

The only realistic way to keep a unique password for every account is to stop trying to remember them. That is the entire job of a password manager: it generates and stores a different strong password for each site so you only have to remember one.

What actually makes a password weak

Avoid these, which cracking tools try first:

• Anything based on your name, birthday, pet, or favorite team
• Common words and phrases with predictable substitutions
• Keyboard patterns like "qwerty" or "123456"
• Reusing a password from another account
• Short passwords, no matter how "complex" they look

You can test whether your password contains an obvious keyboard pattern with our keyboard pattern detector.

The realistic system

Here is the workflow that actually holds up:

1. Pick one strong master password or passphrase and memorize only that. See what is a master password.
2. Let a password manager generate a unique 16+ character password for every other account.
3. Turn on two-factor authentication where it matters. See 2FA vs password manager.
4. Periodically check whether any of your passwords have leaked in a breach.

If you are on a Mac, Passlock stores your passwords in the native macOS Keychain and works completely offline, so your vault never touches a server. It also adds an unusual twist: you can deliberately lock a password behind a time delay or a word challenge when you want to break a habit, not just protect an account.

A strong password is the floor, not the ceiling. Get the basics right — length, randomness, uniqueness — and you have already beaten the vast majority of attacks.