Password Strength Checker
Estimate password strength from its length and character variety via entropy. Your password never leaves your browser.
Input
Output
Enter a password (never sent anywhere)
FAQ
Is my password safe here?
Yes. It is only used for the in-browser calculation and never stored or transmitted anywhere.
How is strength calculated?
The charset size is estimated from the character types used, and entropy = length × log₂(charset size).
Does it detect dictionary words?
No. It is an entropy estimate, so common words may be weaker in practice. Use the Password Generator for strong passwords.
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