Free Password Entropy & Strength Estimator Tool

A secure, client-side diagnostic tool for evaluating password security.

Detected / Forced Patterns

Calculated Entropy

0 bits

Bit count represents mathematical randomness.

Strength Level

Enter password to analyze

Estimated Crack Time

Desktop PC (109 guesses/sec) -
Server Cluster (1011 guesses/sec) -
Supercomputer (1013 guesses/sec) -

Why Entropy Matters

Entropy measures the unpredictability of a string. Higher entropy means an attacker needs to guess significantly more combinations to crack the code. Even a small increase in length often provides more security than complex character mixing.

Security Tips

Aim for at least 80 bits of entropy for sensitive accounts. Use passphrase-style passwords (a sequence of random words) which are often easier to remember and provide massive entropy compared to short, complex passwords.