Password strength checker
Type a password to see entropy + time-to-crack against three attacker speeds. The value never leaves the browser — all computation is client-side.
Enter a password
Computation is 100% client-side. The value never leaves the browser; no network request is made on input.
Tips: length beats complexity. A 16-character lowercase passphrase has more entropy than an 8-character Tr0ub4dor pattern. NIST 800-63B recommends a 12+ character minimum without composition rules; pair with a password manager + MFA.