Weak passwords are responsible for 81% of data breaches. Here’s how to generate passwords that are genuinely strong — and why most “password rules” you’ve been taught are wrong.
What Makes a Password Strong?
The strength of a password is determined by entropy — the number of possible combinations an attacker would need to try. Two factors control entropy:
- Length — Every additional character multiplies the possible combinations exponentially
- Character variety — Using uppercase, lowercase, numbers, and symbols increases the pool
Key insight: length matters more than complexity. The password correct-horse-battery-staple (28 chars, lowercase) is stronger than P@ssw0rd! (9 chars, mixed) because it has more entropy.
How to Generate a Strong Password
Quick Method (Recommended)
- Open our Password Generator
- Set length to 16 or higher (20+ for critical accounts)
- Enable all character types (uppercase, lowercase, numbers, symbols)
- Click Generate
- Copy and store in a password manager
Password Strength by Length
| Length | Character Types | Time to Crack | Strength |
|---|---|---|---|
| 8 chars | All types | ~39 minutes | Weak ⚠️ |
| 12 chars | All types | ~3,000 years | Medium ✅ |
| 16 chars | All types | ~1 trillion years | Strong 💪 |
| 20 chars | All types | Heat death of universe | Uncrackable 🔒 |
Based on 10 billion guesses per second (modern GPU attack)
Password Rules You Should Follow
Do ✅
- Use 16+ characters for all accounts
- Use a different password for every site
- Use a password manager (Bitwarden, 1Password, KeePass)
- Enable 2FA/MFA everywhere possible
- Use our Password Generator for random generation
Don’t ❌
- Don’t use personal info (birthdays, pet names, addresses)
- Don’t use dictionary words (even with number substitutions)
- Don’t reuse passwords across sites
- Don’t share passwords via email or text
- Don’t use password patterns (Password1, Password2, Password3)
How Password Attacks Work
Brute Force
Tries every possible combination. Defeated by length — each character multiplies the search space.
Dictionary Attack
Tries common words and phrases. Defeated by randomness — use our generator instead of making up passwords.
Credential Stuffing
Uses leaked passwords from other breaches. Defeated by unique passwords per site.
Frequently Asked Questions
How long should my password be?
At minimum 12 characters, but 16+ is strongly recommended for 2026. Our Password Generator defaults to 16.
Are passphrases better than random passwords?
Both work if long enough. A 4-word passphrase (20+ chars) is comparable to a 16-char random password. Random passwords are more space-efficient.
Should I change passwords regularly?
Only if you suspect a breach. Forced rotation leads to weaker passwords. Use unique, strong passwords and change them when compromised.
Related Tools
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- Base64 Encoder — Encode credentials safely
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