Check how strong your password is with entropy analysis, estimated crack times, common password detection, and pattern recognition. Get actionable suggestions to improve your password security.
Your password never leaves your browser. All analysis is performed locally.
Generate strong passwords and passphrases with crypto randomness.
Generate crypto-secure random strings in hex, Base64, and more.
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Format, beautify, minify, and validate JSON with syntax highlighting.
Convert text to camelCase, snake_case, kebab-case, and 7 more.
Entropy measures the randomness of a password in bits. Each bit doubles the number of possible combinations an attacker must try. A password with 80 bits of entropy has 2^80 possible combinations.
Online throttled (10/sec) simulates an attacker guessing against a rate-limited website. Offline fast (10B/sec) simulates cracking a stolen password hash with a fast CPU. GPU (100B/sec) simulates using a high-end GPU rig.
Your password is checked against an embedded list of commonly used passwords. The check happens entirely in your browser — the password is never sent anywhere.
The tool detects sequential characters (abc, 123), repeated characters (aaa, 111), and keyboard walk patterns (qwerty, asdf). These patterns drastically reduce the effective entropy of a password.
Yes. Your password never leaves your browser. All analysis runs locally in JavaScript. Nothing is sent to any server, and no data is stored. You can verify this in your browser's network inspector.