GlenCalc

Password generator

Passwords are generated in your browser with its cryptographic random source and are never sent anywhere or stored.

Your answer

Press Generate.

Worked out in your browser. Nothing you type is sent to a server.

How we worked it out

Updated as you change the numbers.

    Method and assumptions

    Characters are drawn uniformly with the Web Crypto API. Strength in bits measures how many guesses an attacker would need: each extra bit doubles it. Length matters more than symbols; a password manager can store long passwords for you.

    Questions

    How long should a password be?

    At least 15 characters for important accounts, as NIST guidance suggests; longer random passwords are stronger.

    Sources

    Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.

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