Password Entropy Calculator
Measure the mathematical strength of your passwords using bit entropy to determine how resistant they are to brute-force attacks.
Measure the mathematical strength of your passwords using bit entropy to determine how resistant they are to brute-force attacks.
Frequently asked questions
Is Password Entropy Calculator free to use?
Yes, Password Entropy Calculator is completely free with no sign-up, usage limits, watermarks or ads gating the result. Just open it and use it.
Is Password Entropy Calculator safe and private?
Yes. Password Entropy Calculator runs entirely in your browser — your files and data never leave your device and nothing is uploaded to any server.
Do I need to install anything to use Password Entropy Calculator?
No installation is required. Password Entropy Calculator works in any modern web browser on Windows, macOS, Linux, Android and iOS.
How do I use Password Entropy Calculator?
Measure the mathematical strength of your passwords using bit entropy to determine how resistant they are to brute-force attacks.. Enter or upload your input, and you'll get instant results you can copy or download.