Password generator.
Cryptographic-grade passwords and passphrases. Nothing leaves your browser, nothing is logged, nothing is synced.
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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