🔑 Password Generator & Strength Analyzer

What is a Password Strength Checker & Generator?

A strong password is your first line of defense for account security. This tool generates unguessable passwords using the cryptographically secure Web Crypto API (crypto.getRandomValues), and accurately measures the strength of any password using bit-level entropy. All processing happens entirely in your browser — no data is sent to any server — ensuring complete privacy. Customize length (8–64 chars), character sets (uppercase, lowercase, digits, symbols), and ambiguous character exclusion to create the right password for every situation.

Common Use Cases

How to Use

1. 1
   Select Mode

   Pick Generate mode to create a new password, or switch to Analyze mode to evaluate the strength of a password you already use.
2. 2
   Configure & Generate

   In Generate mode, drag the slider to set length (8–64 chars), toggle uppercase, lowercase, digits, symbols, and ambiguous character exclusion, then click Generate.
3. 3
   Check Strength & Entropy

   Review the strength gauge, bit-level entropy score, and estimated crack time based on a 1-trillion-guesses-per-second attack. 72+ bits is considered practically uncrackable.
4. 4
   Copy & Store Safely

   Click the copy button to save the password to your clipboard, then immediately store it in a password manager like Bitwarden or 1Password.

Frequently Asked Questions