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Password entropy estimate
Estimate theoretical entropy from the character pool. Assumes random selection; does not measure real password security.
01Enter your values
Runs in your browser02Password entropy estimate
Runs in your browser
How it works
Estimate theoretical entropy from the character pool. Assumes random selection; does not measure real password security.
H = n × log₂(R)
Runs in your browser
Discovery source
Your data stays yours
Inputs are processed on this page and are never sent to a server.
About this tool
Use tool ↑Estimate theoretical entropy from the character pool. Assumes random selection; does not measure real password security.
Assess password patterns locally; the 0–4 score and theoretical entropy are not security guarantees.
How to use it
- Enter your values
Password
- Calculate / generate
Estimate theoretical entropy from the character pool. Assumes random selection; does not measure real password security.
- Result
111.68754534 bits
Calculation method
H = length × log₂(pool)
Password entropy estimate
- Password
- Excluded from report
Theoretical upper bound
111.68754534 bits
Frequently asked questions
How should I interpret the result?
Assess password patterns locally; the 0–4 score and theoretical entropy are not security guarantees.
Where does my data go?
Calculations run on your device. Form inputs are not sent to a server.