Password Strength Checker
Type a password to see its entropy, a strength score and exactly what makes it weak. Nothing leaves your browser.
- At least 12 characters
- Lowercase letters
- Uppercase letters
- Numbers
- Symbols
- Good character variety
Enter a password to see an estimate.
Frequently asked questions
How is the strength score calculated?
We estimate entropy in bits from the password length and the size of the character pool it uses (lowercase, uppercase, digits, symbols). More bits means harder to brute-force.
Is my password sent anywhere?
No. Everything runs locally in your browser — nothing is stored or transmitted.
What crack-time estimate is shown?
It is a rough illustration based on entropy and an assumed guessing speed. Treat it as a relative guide, not a guarantee.