The Science of Secure Passwords
In the digital age, a password is the only thing standing between a hacker and your personal data. However, humans are notoriously bad at creating random sequences. We tend to use names, birthdates, or patterns like "123456". This tool uses mathematical entropy to generate passwords that are mathematically resistant to guessing attacks.
Random vs. Passphrase
Random Characters
Example: Xy9#mP2$Lq
Best for highest security in short lengths. Ideal for password managers where you don't need to type it often.
Passphrase (XKCD Style)
Example: Correct-Horse-Battery-Staple
Easier for humans to remember, but very hard for computers to guess due to the sheer number of word combinations.
Client-Side Security
This tool is 100% private.
- We use the browser's
window.cryptoAPI, which generates cryptographically strong random numbers based on your device's hardware noise. - The passwords generated here are created in your browser's memory and are never sent to our servers.
Understanding Entropy
Entropy is a measure of "unpredictability". A password like "password123" has very low entropy because it is common. A generated password like "7f&9#xA2" has high entropy because every character was chosen randomly from a pool of 90+ possibilities. High entropy forces hackers to try every single combination (Brute Force), which can take millions of years for long passwords.