Password Entropy Calculator
Measure the true strength of your password in bits and understand what makes it secure.
Password Analyzer
Enter a password below to calculate its entropy in real-time.
What does this tool do?
The Password Entropy Calculator measures the true strength of your password in terms of bits of entropy. Instead of following simplistic rules like "needs a number and a symbol", entropy quantifies how unpredictable a password is.
A higher entropy value means an attacker would need much more time and computational power to guess your password by brute force.
Frequently Asked Questions (FAQ)
What entropy value is considered secure?
Below 60 bits: Weak; 60-80 bits: Fairly secure; 80-128 bits: Strong; Above 128 bits: Extremely strong.
Is this calculator safe?
Yes, all calculations are performed exclusively in your browser. Your password never leaves your computer.
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