Password Length vs Complexity
On a random password, adding characters usually beats adding a punctuation rule to a short string.
Complexity rules still help when they stop you from using a dictionary word.
The trade-off in one sentence
If each character is chosen at random, a longer password with a modest character set outruns a short password that is forced to include uppercase, a digit and a symbol.
A concrete comparison
Suppose a generator can pick from 26 lowercase letters. Eight random letters give 26⁸ possibilities. Sixteen random letters give 26¹⁶ — far more, without adding a single !.
Now take an 8-character password that must include mixed case, a digit and a symbol. The extra symbols enlarge the set, but eight slots is still eight slots. People also satisfy those rules in predictable ways (Name2024!), which throws away the extra set size.
| Change | When it helps |
|---|---|
| Add length to a random password | Almost always, if you can store it |
| Add character types to a random password | Useful; smaller effect than the same number of extra characters |
| Require a symbol on a human-chosen short word | Stops the most obvious dictionary picks; easy to game |
What complexity rules are for
Rules exist because people pick words. They are a blunt tool. They do not replace uniqueness or a manager. For how long to go when the password is random, see how long a password should be.
Generate a random string — length and character types together — with the MultiConvers password generator, then follow how to create a strong password.
FAQ
- Should I turn symbols off in a generator?
Only if the site rejects them or you must type the password by hand. A slightly smaller set at the same length is a little weaker, not a disaster.
- Why do sites still demand a symbol and a number?
Those rules try to block “password” and “letmein”. They do not make Summer2024! a good secret.
Related guides
How Long Should a Password Be?
For a random generated password, 16 characters is a practical default. Longer is stronger if a manager stores it. Site minimums of 8 characters are a floor, not a target.
How to Create a Strong Password
Use a unique, randomly generated password for each site, store it in a password manager, and prefer length over a clever substitution on a short word.
Related tools
See all guides.