🔑 Password Generator

What is a Password Generator & Crack Time Estimator?

This password generator uses cryptographically secure random numbers (crypto.getRandomValues) to create unpredictable, high-entropy passwords instantly. Beyond generating passwords, it calculates the information-theoretic entropy and visualizes the estimated time to crack the password using a modern GPU cluster capable of 1 trillion guesses per second. All processing happens locally in your browser — generated passwords are never sent to any server.

Common Use Cases

How to Use

1. 1
   Configure options

   Set password length (8–64), and toggle uppercase, lowercase, digits, symbols, and ambiguous character exclusion. Watch the strength bar update in real time as you change options.
2. 2
   Generate password

   Click 'Generate New Password' to instantly create a new password. Click as many times as needed until satisfied.
3. 3
   Check crack time & copy

   Review the strength rating (Very Weak to Very Strong) and estimated crack time, then click copy to save to clipboard.
4. 4
   Save to a password manager

   Paste the generated password into a password manager like 1Password or Bitwarden immediately. This lets you use a unique, complex password for every account without having to memorize any of them.

Frequently Asked Questions