Password Strength Checker
Check password score and entropy
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Strength Result
Strength analysis will appear here
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About this tool
Evaluate password strength with score, entropy estimate, and character class analysis. Useful for account security checks, policy tuning, and educating users about strong credential patterns. Analysis runs locally in browser so sensitive input is not uploaded.
Frequently Asked Questions
What does entropy mean for passwords?
Entropy estimates how hard a password is to guess based on length and character space size.
Is a high score always secure?
Higher scores are better, but reused passwords and leaked credentials still pose significant risks.
Is my password uploaded anywhere?
No. The checker runs entirely in your browser and does not send input to servers.