Password Strength Checker
Estimate how hard a password is to crack — entropy in bits, offline/online crack-time, and common weakness warnings. Your password is analyzed locally and never leaves this page.
Password
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Entropy: 0 bits
Chars: 0
Estimated crack time
| Threat model | Speed | Time to crack |
|---|---|---|
| Online (throttled) | 1k / sec | — |
| Offline (consumer GPU) | 1e10 / sec | — |
| Offline (massive) | 1e14 / sec | — |
Estimates assume a random password drawn from the detected character pool. A password built from dictionary words or patterns cracks far faster — see warnings below.
Warnings
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Strength is an estimate, not a guarantee. Use a unique password per site and a password manager for anything important.