Password Strength Checker

Evaluate how strong a password really is.

Enter a password to test

What Is a Password Strength Checker?

The Password Strength Checker evaluates how resistant a password is to guessing and brute-force attacks. It scores the password from 0 to 4 based on length, character variety, and entropy, estimates how long it would take to crack at 10 billion guesses per second, and suggests concrete improvements.

How to Use This Password Strength Checker

1
Type a passwordEnter the password you want to test into the field.
2
Review the scoreSee the strength level and entropy estimate.
3
Read the suggestionsFollow the listed tips to make the password stronger.

Frequently Asked Questions

Entropy measures the unpredictability of a password in bits. Higher entropy means far more possible combinations and a longer time to crack. Length is the biggest factor.

A score of 4 means the password is very strong. Aim for at least 12 characters that mix uppercase, lowercase, digits, and symbols.

No. The password is analyzed entirely in your browser and never sent to or stored on a server.

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