Password Strength Checker

Review Unicode length, observed character pool, a theoretical random upper bound, and simple repeated/common-sequence warnings without pretending to predict exact crack time.

Password to assess

—Heuristic rating

0Unicode code points

0Observed alphabet

—Theoretical upper-bound bits

Type a password to beginThis is a local heuristic, not an offline-cracking-time prediction. NIST notes that human-chosen password entropy is difficult to estimate and emphasizes length, blocklists, and rate limiting.

Sensitive values stay in this browser page. Theoretical entropy/search-space math assumes uniform random generation and is not a crack-time promise for human-chosen passwords. Use a reputable password manager for real account storage.

How to use this Password Strength Checker

Assess password length and obvious local patterns without uploading the password. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.