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Free Password Strength Analyzer Pro — Entropy, Patterns & Passphrases
Free Password Pro is a free online tool by US AI. It measures real entropy, flags sneaky weak patterns like p@ssw0rd, and generates memorable passphrases — all on your device.
⚠️ Never enter a real password here. This is a pattern check only — it does not look up real data breaches.
🔍 Analyze a password
🎲 Passphrase generator
Generated on this device — nothing is sent anywhere.
📖 How to use
- Type a TEST password (never a real one) to see its entropy and weak patterns.
- Read the crack-time estimate and fix flagged patterns.
- Generate a 4–6 word passphrase for accounts that allow them.
✨ Why use this tool?
US AI's password analyzer is honest about its limits: pattern checks only, no breach lookup, and your input never leaves the browser.