Question 1

What is a Password Strength Checker?

Accepted Answer

A password strength checker uses Shannon entropy to quantify how hard a password is to crack. Entropy measures unpredictability based on character set size and password length — higher is harder to guess.

References

Question 2

How does the Password Strength Checker work?

Accepted Answer

Entropy (bits) = log₂(charset_size) × length Then: Charset grows by adding: uppercase (+26), lowercase (+26), digits (+10), symbols (+32) Then: A 12-character password using all four types yields ~78 bits entropy Then: Rule of thumb: 60+ bits = strong, 80+ bits = very strong.

Question 3

Can you give an example of how to use the Password Strength Checker?

Accepted Answer

Example: Input "password" — 8 chars, lowercase only gives a result of Entropy ~37.6 bits — Very Weak.

Question 4

Is the Password Strength Checker free to use?

Accepted Answer

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

Question 5

How accurate is the Password Strength Checker?

Accepted Answer

Our Password Strength Checker uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

Password Strength Checker

Password Strength Checker

What is Password Strength Checker?

How to Use Password Strength Checker

Example Password Strength Checker Examples

Entropy Strength Reference

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