Password Generator
Generate strong, secure, and random passwords.
Password Security & Entropy
Entropy is a measure of password unpredictability (measured in bits). A password with higher entropy is exponentially harder for computers to guess using brute-force attacks.
Time to Crack (Modern GPU Farms)
| Length | Numbers Only | Mixed Characters |
|---|---|---|
| 8 chars | Instantly | 8 hours |
| 12 chars | Instantly | 34,000 years |
| 16 chars | Seconds | Billions of years |
Passphrases vs. Passwords
Some security experts recommend passphrases (e.g., "CorrectHorseBatteryStaple") because they are easier to remember but still offer high length-based security. However, for maximum security, a truly random string of 16+ mixed characters is unbeatable.
Frequently Asked Questions
Is it safe to use an online generator?
Yes, provided it's client-side. Our tool uses your browser's local JavaScript engine (crypto.getRandomValues) to generate the string. No data is ever sent to our servers.
How often should I change passwords?
NIST Guidelines (2025) now suggest changing passwords only when compromised, rather than mandatory frequent rotations, which often lead to weaker passwords (e.g., changing "Pass1" to "Pass2").
What are Salt and Hashing?
When websites store your password, they should "Hash" it (turn it into a scrambled string) and "Salt" it (add random data) so that even if their database is hacked, your original password remains hidden.
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