NullKit

Privacy · Free browser tool

Private Password and Passphrase Generator

Generate a random password or memorable passphrase locally with cryptographically secure browser randomness. Nothing is transmitted or stored.

Runs on this device No file upload Free to use

Private workspace

Create a new credential with secure device randomness without submitting it to a password-generation service.

Local processing

Ready.

A new credential will appear here

Generation uses secure randomness from this browser. Save the result in a trusted password manager.

What this tool does

A focused job, with a visible boundary.

Create a new credential with secure device randomness without submitting it to a password-generation service.

01

Cryptographically secure randomness

02

Password and passphrase modes

03

Visible entropy estimate and one-tap copy

Know the limits

Local does not mean unlimited.

Browser processing protects the file from an upload workflow, but the browser, device, output format, and selected settings still matter.

  • A generated credential is only safe if it is stored and used securely.
  • Browser extensions, compromised devices, screen recording, or clipboard history remain outside this page’s control.
  • Do not reuse the same generated credential across services.

Four local steps

How to use credential generator.

  1. 01

    Choose password or passphrase mode.

  2. 02

    Set the length and character groups or passphrase options.

  3. 03

    Generate locally and review the entropy estimate.

  4. 04

    Save it directly in a trusted password manager and avoid insecure copies.

Clear answers

Credential generator questions.

Is the generated password sent anywhere?

No. Generation uses crypto.getRandomValues in this browser and the page does not submit the result.

Should I memorize a random password?

Usually not. Store unique random passwords in a reputable password manager. A multi-word passphrase can be more suitable when memorization is genuinely required.

Is copying to the clipboard completely safe?

No. Other software, clipboard history, extensions, or a compromised device may expose clipboard contents. Save the result promptly and clear it when appropriate.