Password generator
Strong random passwords made in your browser.
About this calculator
Set the length and character types, and a new password appears. It is made on your device, and it is never sent to our server.
Longer is stronger. Use a different password for each account, and keep them in a password manager rather than a file or note.
How it works
Passwords are made on your device with the browser's secure random source and are never sent anywhere.
The story behind it
Where the idea came from: Computer passwords are usually traced to Fernando Corbató at MIT, early 1960s.
Corbató's shared computer system needed a way to keep each user's files apart, and the password was the answer. Today the biggest risks are weak choices and reusing the same one everywhere. This generator creates passwords on your own device using the browser's secure random source, and never sends them to a server.
Why you can trust this calculator
- It runs in your browser. Nothing you type into it is sent anywhere.
- The method is explained on this page, so you can check it yourself.
- Free to use, with no sign-up.
- Results are estimates, so please double-check anything important.
- Spotted a mistake? Tell us and we'll look into it.
After 15 years as a mathematics educator, I built CalculStore to give students, teachers, professionals and anyone working with numbers simple, reliable tools.
Meet the founder