HOW TO CREATE A STRONG PASSWORD THAT CANNOT BE CRACKED
Over 80% of data breaches involve weak or stolen passwords. Yet most people still use passwords like "password123" or their pet's name. This guide explains exactly what makes a password strong — and how to create uncrackable passwords for every account you own.
What Makes a Password Strong?
Password strength comes down to one thing: how long it would take a computer to guess it. Modern computers can test 10 billion passwords per second using brute force attacks. Here is how different passwords hold up:
- "password" — cracked instantly
- "P@ssw0rd" — cracked in under 1 second (common substitutions are known)
- "correct-horse-battery" — takes months
- "xK#9mP!2qR@nL5" — takes billions of years
Every additional character multiplies the time to crack exponentially. A 12-character password is not twice as hard to crack as a 6-character one — it is 1,000,000 times harder.
The Four Elements of an Uncrackable Password
1. Length — Minimum 12, Ideal 16+
Length is the most important factor. A 16-character password with only lowercase letters is stronger than an 8-character password with symbols. Aim for at least 16 characters for important accounts like email and banking.
2. Uppercase Letters (A-Z)
Adding uppercase letters increases the character pool from 26 to 52, making each character position exponentially harder to guess.
3. Numbers (0-9)
Numbers add 10 more possible characters per position. More importantly, they break up patterns that attackers look for.
4. Symbols (!@#$%^&*)
Symbols add the biggest boost to password strength. They expand the character pool to 95+ options per position and are the hardest for automated tools to crack.
How to Generate a Strong Password Instantly
Do not try to invent random passwords manually — humans are terrible at being random. We unconsciously use patterns, familiar numbers, and meaningful dates. A computer generating your password is always better.
Generate an Uncrackable Password Now
Cryptographically random. Generated in your browser. Never stored anywhere.
🔐 Open Password GeneratorCheck Your Existing Passwords
Before changing all your passwords, test your current ones to understand how vulnerable you are. Our password strength checker analyses your password across 6 security factors and shows your estimated crack time.
Test Your Password Strength
100% private — your password never leaves your browser.
🛡 Check Password StrengthThe Passphrase Method
A passphrase is a string of 4-5 random words joined together. It is both strong and memorable:
- correct-horse-battery-staple — 28 characters, easy to remember
- blue-cloud-piano-seven-river — 28 characters, strong and memorable
The key is that the words must be random — not a phrase from a song or a sentence you would naturally say. Roll a dice to pick words from a dictionary, or use a passphrase generator.
Password Security Rules to Never Break
- Never reuse passwords — if one site is breached, every account with that password is compromised
- Never use personal information — birthdays, names, and pet names are guessed first
- Never use common substitutions — @ for a, 3 for e, 0 for o are all in hacker dictionaries
- Never write passwords in plain text — no sticky notes, no Word documents, no email drafts
- Enable 2FA everywhere — even a weak password with 2FA is better than a strong password without it
How to Store Strong Passwords Safely
The only practical way to use unique, strong passwords for every account is a password manager. They remember all your passwords so you only need to remember one master password.
- Bitwarden — free, open-source, most trusted
- 1Password — excellent paid option, great for families
- Dashlane — good free tier, premium features worth paying for