Cat Password / browser security utility

Free online password generator

Create strong, random passwords with uppercase and lowercase letters, numbers, and symbols. Cat Password generates them in your browser with no sign-up required.

Generation
Local
Length
8-48
Account
Not required

01

Generated locally

Password generation runs in this browser with the Web Crypto API. Creating a password does not call a Cat Password API.

02

Cryptographically random

Character selection uses crypto.getRandomValues() and unbiased sampling rather than predictable pseudo-random numbers.

03

Tuned for each login

Choose a length from 8 to 48 characters and include uppercase, lowercase, numbers, and symbols to match a site's requirements.

Password generator questions

Strong passwords, plainly explained

Is an online password generator safe?
Prefer a generator that runs locally with cryptographic browser randomness. Cat Password follows that model.
How long should a password be?
Use the longest password a service accepts. Sixteen or more random characters is a practical default for most logins.
Should every login be different?
Yes. Generate a unique password for each account and store it in a trusted password manager instead of reusing it.

Cat Password creates passwords. You decide where to save them.

NIST password guidance
Password generator page