Password Generator

Create strong, random passwords of any length with lowercase, uppercase, numbers and symbols, and see their estimated strength.

What is the Password Generator?

A good password is long and random. Generated passwords avoid the predictable patterns people use.

How does it work?

Characters are drawn with the browser’s cryptographically secure random generator, using rejection sampling to avoid bias. At least one character from each selected set is guaranteed, then the result is shuffled.

Formula

Entropy (bits) = length × log₂(character pool size)

Example

A 16-character password from 84 characters has about 102 bits of entropy — very strong.

Frequently asked questions

Are generated passwords stored?

No. They are created in your browser and never sent anywhere.

How long should a password be?

At least 12–16 characters for important accounts. Use a password manager so you don’t have to remember them.

Related tools

Enable JavaScript to use this calculator.