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Cryptographically secure password generation powered by Web Crypto API. Your passwords never leave your device.
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Built for security-conscious users who refuse to compromise
Uses Web Crypto API with rejection sampling to eliminate bias. True randomness, not pseudo-random.
Everything happens in your browser. No servers, no tracking, no data collection. Period.
See exactly how strong your password is with live entropy calculation in bits.
Last 50 passwords saved locally with export to CSV or TXT. Your data stays on your device.
Random, pronounceable, or passphrase. Choose the style that works for your needs.
Fine-tune every aspect: length, character sets, exclusions, keywords, and custom symbols.
PassZenith uses the Web Crypto API's getRandomValues() function,
which provides cryptographically strong random values directly from your
operating system's entropy source.
Entropy measures unpredictability. Higher bits = stronger password.
E = log₂(CL)
C = charset size, L = length
Learn more about how to generate unbreakable passwords
To generate unbreakable passwords, you should use a cryptographically secure generator like PassZenith. An unbreakable password typically typically consists of at least 16 characters, including a mix of uppercase letters, lowercase letters, numbers, and symbols. By avoiding common patterns and using our Web Crypto API-powered tool, you create unique credentials that would take centuries to crack using brute-force attacks.
Yes, but only if the generation happens entirely on your device (client-side). PassZenith is arguably the safest way to generate passwords because it runs 100% in your browser. No data is ever sent to a server. Unlike other online tools that might log your data, our zero-knowledge architecture ensures your secrets remain yours alone.
A secure password is defined by its entropy (measured in bits). The higher the entropy, the harder it is to guess. Factors that increase strength include length (longer is better), character variety, and unpredictability. Our tool eliminates human bias by using the browser's native random number generator, ensuring every character is truly random.
Humans are predictable. When we create passwords manually, we tend to use names, dates, or simple patterns (like "Password123"). Hackers know this. A random password generator removes this human element, creating complex strings that have no logical pattern, making them resistant to dictionary attacks and social engineering.
We utilize the window.crypto.getRandomValues() method, which is the industry
standard for cryptographic security in web applications. This is far superior to the basic
Math.random() function used by many other sites. Our implementation ensures that
every password you generate is suitable for protecting sensitive accounts like
banking, email, and crypto wallets.
Absolutely not. We prioritize your privacy above all. While we offer a "Local History" feature to help you retrieve a recently generated credential if you accidentally closed a tab, this data is stored strictly in your browser's local memory and is never transmitted to us or anyone else. You can clear this history at any time.