How to Make a Strong Password (and Keep it Secure)

Last updated: August 11, 2026

In a world of endless online accounts, the pressure to create and remember countless passwords can feel overwhelming. You already know that "password123" protects nothing. But is Tr0ub4dor&3 really that much better? It is hard to remember, annoying to type, and, as you are about to see, far weaker than it looks.

Here is the good news: learning how to create a strong password has become much simpler. It is no longer a memory test built on impossible strings of random characters. It is a strategy, and that strategy now lines up with official guidance. In July 2025, the U.S. National Institute of Standards and Technology (NIST) finalized Special Publication 800-63B-4, the standard that most modern password advice follows. This guide turns that standard into plain, practical steps, complete with real examples of what a secure password actually looks like.

How do I create a strong password? Use a passphrase of four or more random, unrelated words, or let a password manager generate a long random string of at least 15 characters. Make every account's password unique, and protect your logins with multi-factor authentication. Length matters far more than symbols.

Key Takeaways for Strong Passwords

• Length beats complexity. A 15-plus-character password is dramatically harder to crack than a short, symbol-stuffed one. NIST now requires a 15-character minimum for passwords used on their own.
• Passphrases are the easy button. A few random words are simple to remember and extremely hard to guess.
• Never reuse passwords. A single reused password can unlock your entire digital life after just one breach.
• Use a password manager. It is the only practical way to keep a unique, long password for every account.
• Turn on MFA. Multi-factor authentication protects you even if your password is stolen, and passkeys are the emerging, phishing-resistant upgrade.

Strong Password Examples: Good vs. Bad

The fastest way to understand what makes a password strong is to see good and bad ones side by side. If you are hunting for password ideas, do not copy any of these exactly. Use them as a model for the shape of a secure password, then generate your own.

The pattern is clear. The bad examples are short or predictable. The good ones win on length and randomness, not on clever symbol swaps. That is the whole game.

Not sure where a password you already use lands on this scale? Run it through the TeamPassword password strength checker to see how it holds up before you rely on it.

How Long Would It Take to Crack Your Password?

Attackers do not sit at a keyboard typing guesses. They run automated tools that try enormous numbers of combinations per second. The single biggest factor in how long that takes is length, and the effect is not gradual. Each character you add multiplies the number of possibilities.

Here is roughly how long a randomly generated password (mixing uppercase, lowercase, numbers, and symbols) would survive against a fast attack.

How these estimates work: They assume a fast offline attack of roughly 100 billion guesses per second against a service that stored your password carelessly. A service that uses modern, slow "hashing" (which NIST now requires) makes cracking far slower still. A service that stored passwords poorly makes it faster. The exact numbers shift with the assumptions, but the shape never changes: every character you add buys you orders of magnitude more protection.

A passphrase reaches the same strength a different way. Its security comes from the number of random words you string together, not just the character count. Four random words is a solid baseline for everyday accounts. For your most sensitive logins, use five or six. If you would rather not think about it at all, a password manager can generate a long random string and remember it for you, which sidesteps the memory problem entirely.

The Four Rules for a Strong Password in 2026

Forget everything you were once told about bolting symbols and numbers onto short words. Modern password security, now codified in NIST SP 800-63B-4, rests on four simple rules.

Rule 1: Prioritize Length with Passphrases

For years, people were told to build short passwords that were "complex." We now know that advice was backwards. A short, complex password like P@$$w0rd! is hard for a human to remember and easy for a computer to crack.

The new gold standard is the passphrase: a sequence of four or more random, unrelated words. Something like Vivid-Purple-Whale-Calendar is easy for you to recall but would take a computer an impractical amount of time to guess. It wins on sheer length, which is the most important factor in password security.

The federal guidance now says the same thing in concrete terms. NIST SP 800-63B-4 states that verifiers "SHALL require passwords that are used as a single-factor authentication mechanism to be a minimum of 15 characters in length" and "SHOULD permit a maximum password length of at least 64 characters." Crucially, it also says services "SHALL NOT impose other composition rules" (those forced mixtures of character types) and "SHALL NOT require subscribers to change passwords periodically" unless there is evidence of a breach. In other words, the era of "must contain one uppercase, one number, and one symbol, changed every 90 days" is officially over.

Rule 2: Never Reuse Passwords

Using the same password everywhere is like using one key for your house, your car, and your office. The moment someone copies it, everything you own is unlocked at once.

Data breaches happen constantly. When a service is hacked, lists of emails and passwords are leaked and sold. Attackers then feed those lists into automated tools that try the same combinations on banks, email providers, and company accounts, a technique called credential stuffing. If you reuse passwords, a breach on some forgotten forum can compromise your entire digital identity.

The only realistic way to keep a unique password for every account is to stop inventing them yourself. A password generator creates unique, high-strength passwords instantly, and pairs naturally with a password manager that stores them.

Rule 3: Use a Password Manager

Following the first two rules by hand (a long, unique passphrase for every single account) is effectively impossible. This is where a password manager stops being optional.

A password manager is an encrypted vault that does the heavy lifting for you. It generates long, random passwords with one click, stores them securely, and fills them in automatically when you log in. NIST is explicit on this point: verifiers "SHALL allow the use of password managers and autofill functionality." Using one is not a shortcut around the rules. It is the recommended way to follow them.

Getting started takes about ten minutes:

1. Install the password manager and its browser extension.
2. Import or generate your passwords, replacing weak or reused ones as you go.
3. Turn on autofill so logging in becomes one click.
4. Enable multi-factor authentication on the vault itself, then protect your master password like the master key it is.

For teams, a shared vault like TeamPassword adds one more benefit: it lets you grant coworkers access to company accounts without ever exposing the underlying password, so nobody resorts to insecure habits like spreadsheets or chat messages.

Rule 4: Turn On Multi-Factor Authentication

If your password is the lock on your front door, multi-factor authentication (also called two-factor authentication, or 2FA) is the deadbolt behind it. MFA requires a second piece of proof to log in, usually a temporary code or a tap on your phone. Even if a criminal steals your password, they cannot get in without that second factor.

Not all second factors are equal. Here is the hierarchy, from weakest to strongest:

• SMS text codes are better than nothing, but they can be intercepted or stolen through SIM swapping, where an attacker hijacks your phone number. Use them only when nothing else is offered.
• Authenticator apps generate time-based codes on your device, with no phone signal required. This is the practical sweet spot for most people. Our guide to the best authenticator apps covers the options.
• Passkeys are the strongest and newest option, covered in the next section.

To turn MFA on, open the security settings of any important account, look for "two-factor" or "multi-factor authentication," and choose the app-based option. The site shows a QR code; scan it with your authenticator app, enter the six-digit code it produces, and save your backup codes somewhere safe.

TeamPassword builds two of these safeguards directly into the product. Its integrated TOTP authenticator generates time-based codes inside the vault, so teams can share accounts that are protected by 2FA without friction. And enforceable 2FA lets an administrator require every user in the organization to switch it on.

Create a Strong Passphrase in Four Steps

If you want to make one memorable password right now (for your password manager's master password, say), here is the whole method.

1. Pick four or more unrelated words at random. The more unexpected the combination, the better. Salmon Trumpet Glacier Whisper beats anything drawn from a favorite song lyric or a common phrase, because predictable word choices are the first thing attackers try.
2. String them together with a separator. Hyphens, dots, or spaces all work: Salmon-Trumpet-Glacier-Whisper.
3. Add a number or symbol only if a site demands it. Length is doing the real work, so drop a digit on the end rather than mangling the words into leetspeak.
4. Store it in your password manager. Once it is saved, you only need to remember the handful you actually type by hand.

For everyday accounts, four words is plenty. For the accounts that guard everything else (your email and your password vault) use five or six.

Passkeys: Where Logins Are Headed

The most significant shift in authentication is the move away from passwords altogether. Passkeys replace the typed password with a cryptographic key stored on your device and unlocked by your fingerprint, face, or PIN. NIST SP 800-63B-4 formally recognizes this approach.

Two things make passkeys compelling. First, there is nothing to type, so there is nothing for an attacker to steal, guess, or phish. Second, a passkey is tied to the specific website it was created for, which means a fake login page cannot trick it. Passkeys are still rolling out across the web, so you will use them alongside strong passwords rather than instead of them for now. But when a service offers a passkey, it is worth taking.

Common Password Mistakes to Avoid

• Reusing passwords. This is the cardinal sin. One breach cascades into many.
• Using personal information. Names, birthdays, anniversaries, pets, and street addresses are often a quick search away for anyone targeting you.
• Using a known-compromised password. Before you commit to a password, check it against the free Have I Been Pwned password database, which lists credentials already exposed in breaches.
• Storing passwords insecurely. Spreadsheets, sticky notes, and email drafts have no encryption and are trivially discovered. There are safer and less safe ways to store passwords, and an encrypted manager is the safe end of that spectrum.

The "Why" Behind Strong Passwords

For those who want the mechanics, here is why these rules hold up.

Hackers use automated tools to guess passwords at enormous speed, an approach called a brute-force attack. Against a poorly protected database, modern hardware can attempt billions or even trillions of guesses per second. The attacker's job is to work through the "search space," the total number of possible combinations, until one matches.

This is where length wins. A short eight-character password has a large search space, but still one a powerful computer can exhaust in hours. Add characters and that space grows exponentially: going from 8 to 16 characters does not double the difficulty, it multiplies it by an astronomical factor, pushing the time to crack from hours to longer than the universe has existed. That single fact is why a 28-character passphrase runs circles around an eight-character tangle of symbols.

There is a second layer of defense you do not control. Reputable services store your password as a "hash," a scrambled, one-way version of the original, and the good ones use deliberately slow hashing algorithms that make each guess expensive. NIST SP 800-63B-4 now requires this, along with checking new passwords against blocklists of known-breached credentials. But you cannot audit how any given service stores your password. The one thing entirely in your control is the strength of the password you create, which is why it is worth getting right.

Frequently Asked Questions

What is an example of a strong password?

A strong password is long and unpredictable. A passphrase such as correct-horse-battery-staple (four random words) or a generator-made string such as 9pK!zR4wLm2$Vx7q (sixteen random characters) both qualify. Both are far stronger than a short password padded with symbols.

What is a good 12-character password?

A good 12-character password is a random mix of letters, numbers, and symbols that you did not choose by hand, for example t9RvV$2xLpQ4. At twelve characters it is strong enough for most everyday accounts. For email, banking, and work logins, step up to 15 or 16 characters, which is also what NIST now recommends as a minimum for passwords used on their own.

What is the "8-4 rule" for creating strong passwords?

The "8-4 rule" is an older guideline suggesting at least eight characters using all four character types: uppercase, lowercase, numbers, and symbols. It is not wrong, but it is outdated. Modern guidance from NIST favors length over forced character mixes, so a longer passphrase beats a short password that merely satisfies the 8-4 formula.

What are the five things that make a password strong?

A strong password is long (aim for 15 or more characters), unpredictable (no names, dates, or dictionary phrases), unique to a single account, free of common substitutions like @ for a, and protected by multi-factor authentication as a backstop.

Are passphrases really safe?

Yes, when they are built from genuinely random, unrelated words. Their strength comes from the number of words, so four is a solid baseline and five or six is excellent for critical accounts. What undermines a passphrase is predictability, such as words drawn from a famous quote or song lyric.

Your Secure Path Forward

Creating a strong password in 2026 is no longer a feat of memory. It is a strategy: lean on long passphrases, keep every account's password unique, and back it all with a password manager and multi-factor authentication. Do that, and you have built a defense that stands up to the attacks that compromise most people.

Protect your team's credentials with TeamPassword

Individual habits protect one person. A team needs those same protections applied consistently across everyone, which is exactly what a shared password manager delivers.

• Enforceable 2FA — Require every user in your organization to switch on two-factor authentication, so your security baseline never depends on who remembered to enable it.
• Integrated TOTP Authenticator — Generate time-based codes inside the vault, so accounts protected by 2FA stay easy for the whole team to reach.
• Detailed Activity Logs — See who accessed what and when, which is invaluable for security reviews and compliance.
• Unlimited Records and Roles — Store every login your team needs and grant access only where it belongs.

Getting started takes minutes with free Google sign-in. Plans start at just $2.41 per user per month, with Enterprise pricing available for larger organizations.

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