Password Strength Checker
Analyze password strength with entropy estimation, pattern detection, and improvement suggestions.
passwordstrengthcheckerentropysecurity audit
Your password is analyzed locally in your browser. It is never sent to any server or stored anywhere.
What is password strength?
It measures how hard a password is to guess.
What we check
- Length and character variety
- Common patterns (123, qwerty, repeats)
- Estimated entropy
Privacy
Your password is analyzed locally and never leaves your device.
Frequently Asked Questions
Quick answers about usage, privacy, and best practices.
Privacy: Everything runs locally in your browser. No data is sent to a server.
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Privacy First: This tool runs entirely in your browser. No data is sent to any server.