Password Generator
Create strong, random passwords and passphrases instantly. Powered by cryptographic randomness — nothing leaves your browser.
Bulk Generate
Why Random Passwords Matter
Every year, billions of credentials are exposed in data breaches. The most common passwords — "123456," "password," "qwerty" — are cracked in less than a second. Even "clever" substitutions like "P@ssw0rd" are in every attacker's dictionary.
Truly random passwords eliminate patterns. A 16-character random password with mixed characters has over 100 bits of entropy — meaning an attacker trying 10 billion guesses per second would need longer than the age of the universe to crack it.
The only way to achieve real randomness is with a cryptographic random number generator, which is exactly what this tool uses.
Password Generator vs. Browser Passwords
| Feature | This Generator | Browser Built-in |
|---|---|---|
| Crypto-secure randomness | Yes | Varies |
| Custom length & character sets | Full control | Limited |
| Passphrase mode | Yes | No |
| Strength visualization | Entropy + time-to-crack | Basic |
| Bulk generation | Up to 50 at once | No |
| Works without sign-in | Yes | Requires account |
How Our Generator Works
Cryptographic Randomness
We use the Web Crypto API (crypto.getRandomValues) — the same standard used by banks and security software. It taps into your operating system's secure entropy source.
Entropy Calculation
We calculate the information entropy of your password in bits: length times log-base-2 of the character pool size. This gives you a precise measure of strength.
Zero Network Calls
Every computation runs in your browser via JavaScript. No API calls, no server-side logging, no analytics on your passwords. Your credentials never leave your device.
Frequently Asked Questions
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