How Strong Is Your Password? A Practical Guide

Password leaks are so common that data breach databases are now searchable by email address. If you have ever used the same password twice, your security depends on the weakest site you registered on. Here is how to make every account genuinely hard to crack.

Length Beats Complexity

The single strongest factor in a password is length. Modern cracking tools try every short password instantly — any password under eight characters can be guessed in seconds regardless of symbols. But the search space grows exponentially with length. A 16-character password with only lowercase letters has far more possibilities than an 8-character one with every symbol on the keyboard.

A good rule of thumb: make passwords at least 12 characters, and prefer 16 or more for anything important.

Why Random Matters

Humans are terrible at being random. Patterns like P@ssw0rd!, dictionary words, birthdays, and keyboard runs are all in the crackers’ dictionaries. A password generator uses a cryptographic random source to pick characters with true uniformity, which removes every pattern a cracker could exploit.

What a Good Generator Offers

When you generate a password, you want options that match the site’s requirements:

• Length control — some sites cap length or mandate a minimum.
• Include or exclude symbols — old systems sometimes reject special characters.
• Avoid ambiguous characters — skips look-alikes like 0/O and 1/l/I.
• Exclude similar characters — prevents copy errors when you transcribe by hand.

Store Passwords in a Password Manager

Strong passwords are worthless if you cannot remember them and end up reusing one. A password manager stores each unique password behind a single master password and fills them in automatically. That way you never need to type or memorize a 20-character string — you just need one master password you can remember, backed by two-factor authentication.

The Bottom Line

Use a generator for every new account, make each password unique, and let a password manager remember them. Your accounts get harder to crack, and one leak no longer becomes a master key to everything else you own.