Free Password Entropy Calculator & Strength Auditor (Local-First)
Privacy First Notice: This tool runs 100% locally in your web browser using client-side JavaScript. Your password or passphrase is never sent over the internet, stored in any database, or logged anywhere.
CakeDanger
Password Entropy & Strength Auditor
🔒 Privacy Guarantee: This analysis is performed 100% locally in your browser (Client-Side). Your password is never transmitted, stored, or sent to any server.
How Password Strength is Really Measured: Understanding Information Entropy
When evaluating password security, most traditional strength meters rely on simple checklist rules: “Does it contain 8 characters? An uppercase letter? A special character?”
Entropy quantifies the degree of randomness or unpredictability in a password. It represents the total size of the search space an attacker must traverse during an exhaustive brute-force attack.