Password Strength Checker

Estimate password strength in this browser. Nothing is sent anywhere.

Strength is estimated in this browser from length, character variety, and a few weak patterns. It is not a guarantee, and the password is never sent anywhere.

Password

Estimate

Enter a password

0 bits · 0 chars

Type a password to see a local estimate. Nothing is sent anywhere.

Worked example

password scores as very weak. A 24-character passphrase with mixed classes sits much higher. The estimate is local entropy and a few pattern checks, not a breach lookup.

FAQ

Is the password sent anywhere?: No. Analysis stays in this browser.
Does a high score mean it is safe?: No. Reused or leaked passwords can still be guessed. Use a password manager.
What are the bits?: A rough entropy figure from length and character set, with penalties for runs and common words.