Using a password generator safely
A generated password is useful when it is long, hard to guess, and different from every other password you use. Reusing a password creates a link between accounts: if one service is breached, the same password may be tried elsewhere. A password manager can create and store a unique password for each account so you do not need to memorize every one.
Choosing length and options
Length is an important factor. Current NIST digital-identity guidance says a password used as the only authentication factor should be at least 15 characters, and recommends that systems support long passwords. Follow the requirements of the service where you will use it, and choose a length that fits its limits.
Character-type settings can help meet a site's rules, but checking every character-type box is not a substitute for length and uniqueness. Avoid basing a password on your name, birthday, school, favorite team, or another detail people could guess. Do not post or share a generated password in a message or screenshot.
Privacy and boundaries
This generator runs in your browser and uses the browser's cryptographic random-number feature for password generation. Treat the result as sensitive: copy it directly into the intended sign-in or password manager, and do not reuse it for another site. The NIST password guidance explains current verifier requirements and why rigid composition rules are not a replacement for good password practices.
Tips for accurate results
Use the longest password a site allows, and let the generator choose characters randomly. Length contributes more to strength than a mix of symbols alone. Store the result in a password manager so each account has a different password.
Common mistakes and limits
Do not reuse a generated password across sites, and do not modify it into something easier to remember. Strength does not protect against phishing or a breach at the service itself, so turn on two-factor authentication where possible.
Learn more: Password strength: why length and randomness matter.