Security Tools
How to Create Strong Passwords
Learn what makes a password strong, why common passwords are dangerous, and how generators create secure credentials.
Password security is critical for online safety. Understanding what makes a password strong helps protect your accounts.
What Makes a Password Strong?
Strength is measured by entropy (randomness in bits). It depends on length and character variety.
- Length: Most important factor. Each character multiplies combinations.
- Variety: Uppercase + lowercase + numbers + symbols = 94+ characters per position.
Entropy Examples
8 lowercase chars = ~38 bits (crackable in hours). 16 mixed chars = ~103 bits (practically uncrackable).
Common Mistakes
- Dictionary words and patterns (password123)
- Reusing passwords across services
- Predictable substitutions (p@ssw0rd)
- Personal information (birthdays, names)
Password Managers
Use a password manager to generate and store unique passwords. Only remember one strong master passphrase (4+ random words).
Frequently Asked Questions
How long should a password be?
At least 12 characters with mixed types, or 16+ for critical accounts. Length matters more than complexity.
Are password generators safe?
Yes, if they use cryptographically secure random generation (Web Crypto API) and work locally without sending data.
Should I change passwords regularly?
Modern guidelines (NIST) say no, unless compromised. Forced rotation leads to weaker passwords. Use unique passwords + MFA instead.