Password Strength & Generator
Most password breaches happen because people reuse predictable base words with a year or symbol tacked onto the end. Use this tool to measure real information entropy in bits, spot predictable patterns, and generate cryptographically random passwords or memorable multi-word passphrases using your browser's hardware random number generator.
Password or Passphrase
Type any password to test it, or generate a fresh one below.
16+ characters is recommended for admin accounts, cloud consoles, and password manager master keys.
Security Evaluation
Based on character pool size and pattern penalties.
Target at least 65 bits for standard business accounts and 80+ bits for administrator credentials.
Practitioner Feedback
How this tool works
Random generation uses window.crypto.getRandomValues() with rejection sampling so every character in the selected pool has an equal mathematical probability of being chosen. Entropy is calculated as length multiplied by the base-2 logarithm of the active character pool, minus penalties for repeated characters, keyboard sequences, calendar years, and common dictionary words.
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