Generate a strong password with entropy

Length beats a single “special character” rule. 16+ random characters from a wide alphabet is enough for most accounts. The meter uses zxcvbn-style guesses, not a magic score from a vendor.

Avoid reuse. A unique password plus a manager is the whole protocol. Passphrases from the word list are easier to type; check the entropy if you shorten the phrase.

Generation is local. We do not store the result. Do not paste the password into a screenshot or a ticket. For hashes of files, use the SHA-256 page instead.

A password of 16 characters from a 90-symbol alphabet has far more combinations than 8 letters. Entropy here is a log of that space, not a promise that a site will accept the string. Words from a diceware list are easier to type and still strong if the list is long and the pick is random. Do not reuse the result, and do not add a birth year at the end: that shrinks the guess space. The meter uses zxcvbn-style guesses. This page is the generator. The glossary defines entropy without the sliders.