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CastlePass

CastlePass

Password generator using chess moves

Website chromewebstore.google.com
Overview

What it is

CastlePass is a free, open-source Chrome extension that creates strong passwords using chess moves. The extension works by turning the chess moves you play against a bot into a secure password using standard hashing (SHA-256).

Intent

I need it when

Use a password generation tool that is transparent, auditable, and built on open-source code

CastlePass is open-source and available on GitHub, allowing developers and security-conscious users to review, audit, and contribute to the code. This transparency builds trust in the security implementation.

Create passwords without storing sensitive data on external servers or trusting third-party password managers

CastlePass generates passwords entirely locally in the browser using SHA-256 hashing. No moves, passwords, or data are sent to any server, maintaining full privacy and eliminating server-side breach risk.

Quickly autofill generated passwords into login forms across websites

After playing a minimum of 4 chess moves, CastlePass automatically generates the password and autofills it into the password field on any website, streamlining the login setup process.

Combine security with an engaging, fun experience while setting up passwords

CastlePass turns password generation into a chess game against a bot, making the process enjoyable for chess enthusiasts and players. The extension provides smart move suggestions to speed up gameplay while generating the password.

Generate strong, unique passwords that are hard to guess and memorable to the user

CastlePass converts chess moves into SHA-256 hashed passwords, ensuring each password is cryptographically strong and unique based on the user's chess gameplay. The chess-based approach makes passwords memorable to the player while remaining secure.

Drop

Not a fit when

  • User needs a password manager that stores and syncs passwords across devices; CastlePass only generates passwords locally without storage
  • User is not a chess player or finds chess-based password generation unintuitive or cumbersome
  • User requires password generation on non-Chrome browsers; CastlePass is Chrome-only
  • User needs quick one-click password generation without playing a chess game first
  • User operates in an environment where playing chess games during login is impractical or prohibited
Commercials

Pricing

Free, open-source Chrome extension View pricing