Free tool
See exactly why a password is weak — and how to fix it.
This analyzer checks length, character variety, common patterns, keyboard walks, dictionary words, and more. It calculates real entropy and estimates crack time. Your password never leaves your browser.
Analyzer
Password Strength Analyzer
Type or paste a password below. Every check runs locally in your browser — nothing is sent over the network.
Your password never leaves your browser. All analysis runs client-side with pure JavaScript — no external APIs, no network requests, no logging.
Result
Strength
Waiting...
Entropy
-
Est. crack time
-
Offline attack, 10B guesses/s
Tips to improve
Type a password above to see the analysis.
Use a password manager to generate and store unique passwords for every account. No human can reliably remember dozens of strong, unique passwords.