CastlePass - Secure Passwords by Playing Chess

Generate secure passwords by playing chess against a bot

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Added Jul 2026

github.com

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What is Castlepass?

CastlePass is a Chrome extension that transforms chess gameplay into secure password generation. Play against a built-in chess bot, and the extension automatically creates strong, hashed passwords using SHA-256 encryption. Designed for users who want an interactive and engaging approach to password security without storing sensitive data online.

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Key Features of Castlepass

Password generation using chess moves
SHA-256 hashing algorithm
Smart chess move suggestions
Instant password auto-fill
No password storage policy
Local computation only
Mix of uppercase, lowercase, numbers, and symbols

Who Should Use Castlepass?

Create strong passwords interactively while gaming

Auto-fill passwords into login forms

Generate unique passwords without external password managers

Learn chess while securing accounts

Castlepass: Pros & Cons

✓Pros

Unique interactive approach to password generation
SHA-256 encryption ensures high security
No data sent online - local computation only
Passwords never stored
Free and open source
Intuitive chess-based password creation

✕Cons

Currently Chrome browser only
No built-in password manager yet (planned for future)
Requires manual installation via developer mode
Limited chess engine difficulty options currently

Frequently Asked Questions about Castlepass

How does CastlePass generate passwords?

You play chess against a built-in bot, and your moves are converted into a strong password using SHA-256 hashing algorithm. The chess moves create unique, randomized passwords with uppercase, lowercase, numbers, and symbols.

Are my passwords stored anywhere?

No. CastlePass has a no storage policy. Generated passwords are not stored on servers or locally unless you manually save them. Everything happens on your device.

What browsers are supported?

Currently, CastlePass is compatible with Chrome browser only. Multi-platform support including mobile is planned for future updates.

Do I need an account to use CastlePass?

No account is required. The extension installs directly into Chrome and works locally on your device.

Can I get help with chess moves?

Yes. CastlePass includes smart chess move suggestions to help you if you need assistance during gameplay.