What Makes a Password Strong?
A strong password has four properties:
- Length โ At least 12 characters; 16+ is better
- Character variety โ Mix of uppercase, lowercase, numbers, and symbols
- Randomness โ No dictionary words, no names, no keyboard patterns (qwerty, 123456)
- Uniqueness โ A different password for every account
Password Length vs Cracking Time
| Password Type | Example | Time to Crack (Modern Hardware) |
|---|
| 6 digits | 123456 | Instant |
| 8 lowercase letters | password | Minutes |
| 10 mixed case + numbers | Abc123XyZ9 | Days |
| 12 mixed + symbols | aB3#kL9@mN2! | Centuries |
| 16 mixed + symbols | (randomly generated) | Billions of years |
How to Generate a Strong Password
Use the tool.tl Password Generator:
- Go to tool.tl/password-generator
- Set length (16+ recommended)
- Check all character types: uppercase, lowercase, numbers, symbols
- Click "Generate"
- Click "Copy" and paste it into a password manager or registration form
Privacy note: Passwords are generated entirely in your browser โ nothing is transmitted to any server, and nothing is logged.
The World's Most Common (Worst) Passwords
If you use any of these, change them immediately โ they're in every attacker's dictionary:
| Rank | Password | Why It's Dangerous |
|---|
| 1 | 123456 | Most common globally โ tried first in every attack |
| 2 | password | Dictionary word โ cracked in under a second |
| 3 | 123456789 | Sequential digits โ trivially guessable |
| 4 | qwerty | Keyboard pattern |
| 5 | iloveyou | Common phrase โ in every dictionary attack list |
A Complete Password Security Strategy
1. Use a Password Manager
You can't memorize dozens of unique 16-character passwords โ and you shouldn't try. A password manager (Bitwarden, 1Password, KeePass) stores them all behind one strong master password. Bitwarden is free and open-source.
2. Enable Two-Factor Authentication (2FA)
Even if a password leaks, 2FA prevents login without your second factor. Enable it on email, banking, and social media first. Use the tool.tl TOTP Generator to test authenticator codes.
3. One Password Per Site
When a site is breached, attackers try leaked credentials on every major platform (credential stuffing). Unique passwords per site mean one breach can't cascade into others.
4. Check If You've Been Breached
Visit haveibeenpwned.com and enter your email to check if your credentials appeared in known data breaches. If yes, change that password immediately on every site where you used it.
Frequently Asked Questions
Is longer always better for passwords?
Yes โ length is the single most important factor. A random 20-character lowercase password is harder to crack than a 10-character password with all character types. Aim for 16+ characters for sensitive accounts.
Are password managers safe?
Yes โ reputable managers like Bitwarden and 1Password use zero-knowledge encryption, meaning even the company can't see your passwords. Using a password manager is dramatically safer than reusing passwords or storing them in a spreadsheet.
Do I really need special characters in my password?
They help, but length matters more. If a site restricts special characters, compensate with extra length (20+ characters). A 20-character random alphanumeric password is very strong even without symbols.