Why use a password generator?
Weak or reused passwords remain the leading cause of account breaches. A password generator removes human bias and creates truly random credentials.
Three key benefits:
- True randomness : no patterns, dictionary words, or personal information
- Configurable strength : adjust length, character types, and complexity to match requirements
- Instant generation : create a new password in milliseconds
Random vs. Memorable: when to use each
Random mode produces maximum-entropy passwords like k7#Qm9!xR2pL$wN4. Use these for:
- Website and app accounts stored in a password manager
- API keys and service credentials
- Any context where you won't need to type the password manually
Memorable mode generates passphrases like Sloppily8-Rosy3-Unlocking8-Angelic4. Use these for:
- Master passwords (the one password you memorize)
- Device unlock codes you type frequently
- Shared passwords you need to communicate verbally
Understanding password entropy
Entropy measures unpredictability in bits. More bits = more combinations = harder to crack.
| Entropy | Strength | Time to crack (10¹² guesses/sec) |
|---|---|---|
| < 28 bits | Very Weak | Seconds |
| 28-35 bits | Weak | Minutes to hours |
| 36-59 bits | Fair | Days to years |
| 60-127 bits | Strong | Thousands to billions of years |
| ≥ 128 bits | Very Strong | Beyond any foreseeable technology |
A 16-character random password from 95 printable ASCII characters has about 105 bits of entropy, firmly in the "Strong" category.