Password Generator — Strong & Cryptographically Secure

Generate random passwords with customizable length, character types, and strength meter.

How It Works

  1. 1Set the desired length and which character types to include.
  2. 2Click Generate to create a new password.
  3. 3Copy the password to your clipboard with one click.

About Password Generator

Weak and reused passwords are the leading cause of account breaches and unauthorized access. Creating truly random passwords is something humans are notoriously bad at — we tend to use predictable patterns, dictionary words, and personal information that attackers can guess. This tool generates cryptographically secure random passwords using the Web Crypto API (crypto.getRandomValues), which provides the same quality of randomness used in encryption and security protocols. Customize the length from 8 to 128 characters and toggle character types including uppercase letters, lowercase letters, numbers, and symbols to meet any password policy requirements. A visual strength meter displays the entropy of your generated password in bits, giving you a clear measure of its resistance to brute-force attacks. Bulk generate up to 20 passwords at once for setting up multiple accounts or creating credentials for a team. Copy any password to your clipboard with a single click.

From the blog

Frequently Asked Questions

Are generated passwords stored anywhere?

No. Passwords are generated using the Web Crypto API in your browser and are never stored or transmitted. Close the tab and they're gone.

What does the strength meter measure?

It calculates the entropy (randomness) of the password based on its length and the character pool size. Higher entropy means more possible combinations and a stronger password.

How long should my password be?

For most accounts, 16 characters with mixed case, digits, and symbols puts you well past 80 bits of entropy — comfortably out of reach of brute force. For high-value accounts or master passwords, aim for 24+ characters.

Is my file uploaded to a server?

No. Transmute processes everything locally in your browser using JavaScript and the Canvas API. Your files never leave your device — there is no server, no upload, no cloud processing.

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