Sudoku - Free Online Number Puzzle Game
Play Sudoku free on Apio Games. Sixteen puzzles across easy, medium and hard, each with a single solution. Pencil notes, clash checking, no download needed. It runs directly in the browser on mobile or desktop, with no download and no account.
Sudoku is the classic number logic puzzle. Fill the grid so that every row, every column and every 3x3 box contains the digits 1 to 9 exactly once. Sixteen puzzles across three difficulties, each with exactly one solution, so every one can be worked out by reasoning rather than guessing. Pencil in notes when a square has more than one candidate, and use Check to reveal clashes without giving the answer away.
How to play Sudoku
- Tap a square, then tap a digit to place it.
- Every row must hold the digits 1 to 9 exactly once.
- So must every column, and every 3x3 box.
- Turn on Notes to pencil in the digits a square could still be.
- Check marks anything that clashes, without telling you the answer.
Game features
- Sixteen puzzles: easy, medium and hard
- Every puzzle has a single solution
- Difficulty rated by the techniques it needs, not the clue count
- Pencil notes that clear themselves as you place digits
- Timer and clash checking
- Progress saved in your browser
Tips for Sudoku
- Start with the row, column or box that already has the most digits.
- Pencil in candidates before guessing: a square with one candidate is free.
- When a digit fits only one square in a box, it belongs there.
Frequently asked questions
What is Sudoku?
Sudoku is the classic number logic puzzle. Fill the grid so that every row, every column and every 3x3 box contains the digits 1 to 9 exactly once. Sixteen puzzles across three difficulties, each with exactly one solution, so every one can be worked out by reasoning rather than guessing. Pencil in notes when a square has more than one candidate, and use Check to reveal clashes without giving the answer away.
Is Sudoku free to play?
Yes. Sudoku is completely free to play on Apio Games, directly in your browser. No payment, subscription, or download required.
Can I play Sudoku on mobile?
Yes. Sudoku works on mobile and desktop browsers with touch-friendly controls, so you can play on your phone or tablet without installing an app.
How many levels does Sudoku have?
Sudoku has 16 levels to complete on Apio Games.
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Canonical URL: https://apio.games/en/games/sudoku/