Password Strength Checker

Name: Password Strength Checker
Author: Nahlawi Tools

Analyze password strength with entropy calculation and pattern detection

ℹ️ About Password Strength Checker

Evaluate password security by calculating information entropy (in bits) and detecting common weakness patterns including dictionary words, repeated characters, sequential patterns, and leaked passwords from known breach databases. Get actionable feedback on how to improve your password strength.

❓ Frequently Asked Questions

What is password entropy?▸

Entropy measures the randomness of a password in bits. Higher entropy means more possible combinations and greater resistance to brute-force attacks. A strong password should have at least 60-80 bits of entropy.

How does the checker detect weak passwords?▸

The checker evaluates length, character variety, common patterns (like 1234 or qwerty), repeated characters, dictionary words, and checks against known breached password lists to assess overall strength.