Secure Password & Passphrase Generator
Build highly secure passwords or memorable word-based passphrases using local cryptographically secure entropy.
100% Client-Side (No data leaves your device)
Generated Results
User Guide: Passwords & Entropy Strength
Entropy and Password Security
Password security is measured in Shannon Entropy bits, representing the exponential search space size. Higher entropy makes cracking via brute-force computational searches exponentially more difficult:
- Weak (< 50 bits): Vulnerable to fast hash cracking dictionaries.
- Medium (50 - 75 bits): Secure against standard online brute force.
- Strong (> 75 bits): Cryptographically secure, requiring billions to trillions of years for cluster supercomputers.
Why Memorable Passphrases?
As established by modern NIST guidelines, humans struggle to recall randomized punctuation strings. In contrast, multi-word Diceware passphrases (e.g. correct-horse-battery-staple) provide superior entropy while remaining effortlessly memorizable.