Password Strength Checker

Estimate password strength in your browser, with a rough crack-time estimate and entropy in bits.

Type a password to instantly see how strong it is, roughly how long it would take to crack, and what to fix — all calculated in your browser.

The check runs in your browser. This checker does not send your password to our server or save it in the app.

Type a password to test

Start typing above to see the strength estimate.

About This Content

The free password checker gives a five-level strength estimate, a rough crack-time estimate, and entropy in bits. It analyzes the input in your browser; the checker does not send the password to the app’s server or save it in app storage. The crack-time figure is a simplified estimate based on 10 billion guesses per second. It does not reflect a specific attack setup, breach exposure, or password reuse.