Password strength

Calculation is local — the password is never sent anywhere.

Entropy = length × log2(alphabet). Alphabet: lower 26, +upper 52, +digits 62, +symbols 94. GPU offline attack ~10¹⁰ tries/s on MD5, ~10⁵ on bcrypt. Minimum: 14+ chars or 4+ words. Password manager + 2FA is the baseline.