Interactive Entropy Calculator
Compare password strength in real-time and see how small changes dramatically affect security. Curious how different encodings impact your entropy assumptions? Explore reference conversions with BinaryConvert alongside this calculator.
Password 1
Enter a password to see analysis
Password 2
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Understanding the Numbers
What is Entropy?
Entropy measures the randomness and unpredictability of your password. It's calculated using the formula:
Higher entropy means more possible combinations, making your password exponentially harder to crack.
How Small Changes Make Big Differences
Adding 1 Character
Increases combinations by 94× (if using all character types)
Adding Symbols
Increases entropy by approximately ~6 bits per character
Length > Complexity
A longer password with fewer character types can be stronger than a short complex one
16+ Characters
Recommended minimum for strong security against modern cracking methods
Try These Examples
passwordTry this weak password to see why it's vulnerable
Password123!See how simple substitutions don't help much
correct-horse-battery-stapleFamous passphrase example - length matters!
T9#kL2@p$Xm4!QRandomly generated - maximum security
Ready to Generate a Secure Password?
Use our password generator to create truly random, high-entropy passwords that are virtually uncrackable.