What is Sudoku Exchange?
Sudoku Exchange is a web app for solving Sudoku puzzles, with no ads. Every hour it offers a fresh random selection of 32 puzzles from its puzzle bank, grouped into Easy, Medium, Hard and Diabolical. You can also type in a puzzle from a newspaper, a book or another site and solve it in the app.
The name comes from sharing: any puzzle you pick or enter gets a link you can send to friends and family, so they can try the same grid and race your time. If you get stuck, the app gives as many hints as you need, and each hint explains why it is a logical next move. It is a hobby project by Grant McLean, and the puzzle bank holds several hundred thousand computer-generated puzzles graded by difficulty.
Main Features
- No ads
- 32 fresh puzzles every hour in four difficulty levels
- Enter your own puzzles to solve
- Share a link to any puzzle
- Unlimited hints that explain the logic
- Light and dark mode, plus an optional timer
- Simple or dual pencil marks, with digit highlighting
- Progress saved so you can come back later
How to Get Started with Sudoku Exchange
- Open sudokuexchange.com and launch the player app.
- Pick a puzzle from Easy, Medium, Hard or Diabolical, or enter your own.
- Fill in digits and use pencil marks for candidates.
- Ask for a hint if you get stuck and read why the move works.
- Share the puzzle link with a friend to compare times.
Sudoku Exchange Pricing
Sudoku Exchange is free and contains no ads. It is a hobby project with no paid plan.
Who Should Use It?
- Sudoku players of every level
- Beginners who want hints that teach the logic
- Families and friends who like to race on the same puzzle
- Solvers who want a clean app for puzzles from other places
- Anyone tired of ad-heavy puzzle sites
Sudoku Exchange Alternatives
- Sudoku.com is a popular site for playing Sudoku at many difficulty levels.
- Krazydad offers free logic puzzles, including Sudoku.
- Simon Tatham's Portable Puzzle Collection is a free set of logic puzzles that run in your browser.
Frequently Asked Questions
Is Sudoku Exchange free?
Yes. Sudoku Exchange is free to use and has no ads.
Can I solve my own Sudoku puzzles on it?
Yes. You can enter a puzzle from a newspaper, book or another site, solve it in the app and share a link to it.
How do the hints work?
Each hint shows a next move and explains the logic behind it. You can ask for as many hints as you need.
What difficulty levels are there?
Puzzles are grouped into Easy, Medium, Hard and Diabolical, based on the hardest solving technique each one needs.
Does it save my progress?
Yes. Your progress on a puzzle is saved so you can close it and return later, and you can turn that off if you prefer.