WeVividWeVividEstimate a password's strength in bits and how long it would take to guess, with warnings for common patterns.
An estimate from length and character variety, reduced for common patterns — real attackers also use word lists, so a random passphrase beats a clever-looking short password. Your password stays in this browser and is not stored.
A measure of unpredictability in bits; each extra bit doubles the guesses needed.
No. It is measured in your browser and never sent or saved.
No. Everything is worked out in your browser and nothing you type is sent to a server.