Test your password security with entropy analysis or generate cryptographically secure random passwords
🔒100% Private: Your password never leaves your device. All calculations are done locally in your browser.
🎲Random Password Generator
👁️📋
0
bits of entropy
Password Length:0
Character Pool Size:0
Possible Combinations:0
Time to Crack:-
✓
Lowercase letters (a-z)
✓
Uppercase letters (A-Z)
✓
Numbers (0-9)
✓
Special characters (!@#$%...)
✓
At least 12 characters
🧮 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)