Replaces Chess.com · Lichess
Play chess against the computer at three levels, pass and play, or invite a friend online.
Puter Sudoku: play free in your browser
Four difficulty levels, daily puzzles and hints that explain the logic.
- Games
- Free · MIT
- Runs in the browser
- No sign-up needed
What is Sudoku?
Sudoku generates its own puzzles and grades them by the reasoning they actually demand — not just by the number of clues. Pick one of four levels or play the daily puzzle, and when you are stuck, the hint explains which technique to use and why, instead of just filling in the answer.
Key features
- Four difficulty levels graded by solving technique
- Daily puzzles
- Hints that explain the logic step by step
- Pencil marks and error checking
- Optional Puter account for saving progress
How to use it
- Open sudoku.puter.com in any modern browser — computer, tablet or phone.
- Start right away — no sign-up. Sign in with a free Puter account only if you want to save to the cloud.
- Want to self-host or hack on it? Run it locally (Node.js 22.12 or newer):
git clone https://github.com/HeyPuter/everything.git
cd everything/src/sudoku
npm install
npm run devMore games apps
Play backgammon against the computer or a friend, on one device or online.
American checkers against the computer or a friend — free, in your browser.
Replaces Microsoft Solitaire Collection
Classic Klondike and Spider solitaire — unlimited undo, works offline.
FAQ
Is Sudoku free?
Yes. Sudoku is part of the Everything Project and its source code is published on GitHub under the MIT license. There is no subscription or trial.
Do I need to install Sudoku?
No. Open sudoku.puter.com in the browser on your computer, tablet or phone.
Do I need an account to use Sudoku?
Not required. It works straight away and keeps data in your browser or on your device; sign in with a free Puter account to save to the cloud.
Summarised from Sudoku’s README in the official repository. CraftSuite is an independent, unofficial guide and is not affiliated with Puter.