catalyst.tools
100% free
No login

Password Generator

Hash & Security

Generate strong random passwords with custom length, characters, and entropy.

#password generator#strong password#random password#api key generator

About Password Generator

Generate strong random passwords with custom length, characters, and entropy. Password Generator runs entirely in your browser — no installation, no uploads, and no data ever leaves your device.

Common use cases: create strong unique passwords for new accounts; generate api keys and secret tokens; produce password suggestions meeting specific policy rules. Whether you are debugging, prototyping, or building production code, having a fast and private tool for this task saves time compared to writing one-off scripts or using an online tool that logs your data.

Like every tool in Catalyst, this one is free forever, requires no login, and is safe to use with confidential data. All processing happens client-side via native browser APIs.

How to use Password Generator

  1. 1

    Open the tool

    Open Password Generator directly — no signup or installation required. The interactive interface loads instantly.

  2. 2

    Paste or enter your input

    Drop your data into the input area. The tool validates and processes your input live as you type or paste.

  3. 3

    Review the result

    The output updates instantly. If the tool has configuration options, adjust them and watch the result update.

  4. 4

    Copy or download

    Use the copy button to send the result to your clipboard. Nothing is saved between page loads, so closing the tab discards everything.

Frequently asked questions

Are generated passwords cryptographically random?
Yes. The generator uses crypto.getRandomValues(), the browser's CSPRNG, which is suitable for cryptographic use. A 16-character password with mixed character sets has ~104 bits of entropy — well beyond the 80-bit threshold considered safe against offline attacks for decades.
Does the generator remember my passwords?
No. Generated passwords are displayed once and never stored, logged, or transmitted. Copy the one you want and close the page to discard the rest.
How long should my password be?
For most accounts, 16 characters with mixed case, digits, and symbols is strong enough for any foreseeable attack. For high-value accounts (email, banking), use 20+ characters. Length matters more than character diversity beyond a certain point.

Related tools

Hash Generator
Hash & Security
HMAC Generator
Hash & Security
JWT Builder and Signer
Hash & Security