🔐 Password Strength Tester

🧮 What is Password Entropy?

Entropy measures the unpredictability and randomness of your password in bits. It's calculated based on the character set size (lowercase, uppercase, numbers, symbols) and password length.

Security Guidelines:

• < 28 bits: Very weak - crackable instantly
• 28-50 bits: Weak to fair - vulnerable to attacks
• 50-60 bits: Moderate - acceptable for low-security needs
• 60-80 bits: Strong - recommended for most accounts
• 80+ bits: Very strong - excellent protection
• 100+ bits: Exceptional - maximum security

Formula: Entropy = Password Length × log₂(Character Pool Size)