How to Create a Strong Password (That You Can Actually Use)
We have all been trained to make passwords "complex" — a capital letter here, a number there, a symbol on the end. But a lot of that advice protects you less than you think, and the real drivers of password strength are simpler to understand.
Strength is mostly about length and randomness
A password's resistance to brute-force guessing comes down to entropy — the amount of genuine randomness it contains. Entropy grows with two things: how long the password is, and how large the pool of possible characters is. Of the two, length is the most powerful lever. Each extra random character multiplies the number of guesses an attacker needs.
🔐Generate a strong random passwordPassword Generator →Why "P@ssw0rd!" is weak
Predictable substitutions — "a" to "@", "o" to "0", a "1" or "!" on the end — are the first thing cracking tools try, because everyone does them. A password built from a common word with these swaps has very little real randomness, no matter how complex it looks. Attackers do not guess character by character; they run dictionaries of exactly these patterns.
Two approaches that work
- A long random string (16+ characters of mixed letters, numbers and symbols) — maximum strength, best stored in a password manager
- A passphrase: four or more random, unrelated words — long, high-entropy, and easier to type when you must
Both work because they are long and unpredictable. The random string wins on raw strength; the passphrase wins when you occasionally need to type a password by hand.
The rule that matters most: never reuse
The single biggest risk is not a weak password — it is the same password used everywhere. When one site is breached, attackers try those credentials on every other service. A unique password per account means one breach stays contained. The only practical way to manage dozens of unique passwords is a password manager.
🔐Create a unique password per accountPassword Generator →Turn on two-factor where you can
Even a strong, unique password is better with a second factor. Two-factor authentication means a stolen password alone is not enough to get in. Enable it on your email and financial accounts first — those are the keys to everything else.
Make passwords long, random, and unique, store them in a manager, and add two-factor authentication. That combination beats any clever substitution trick.