Sudoku

The classic number-placement puzzle

🔢 Fill the grid so every row, column and box has the numbers 1–9!

Math · Ages 8+

Like every game on iplay.free, Sudoku is completely free — no ads, no sign-up, and no downloads. It runs right in your browser, so there's nothing to install and nothing to buy. With no ads and no account, it's safe to hand to a child and easy to pick up any time.

How to play Sudoku

• Goal: Fill every empty square so that each row, each column, and each 3×3 box contains the numbers 1 to 9 exactly once.
• How to play: Tap an empty square, then tap a number to place it. Use ✏️ Notes to pencil in small maybe-numbers, and ⌫ Erase to clear a square.
• Win: Complete the whole grid with no repeats in any row, column or box.

Game modes

Pick the level that suits you — Sudoku offers 3 ways to play:

• Easy
• Medium
• Hard

Skills you'll practise

logical deduction, number placement, problem solving.

Did you know?

🔢 Modern Sudoku was popularised in Japan in 1986 — its name means "the digits must be single." A proper puzzle always has exactly one solution!

Frequently asked questions

Is iplay.free really free?

Yes — every game is completely free, with no ads, no sign-up, and no downloads. There's nothing to buy and no premium tier: it's free forever.

Do I need an account or sign-up?

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Are there any ads?

None. iplay.free runs no ad networks, so there are no banners, no pop-ups, and nothing to mis-tap — which is part of why it's safe to hand to a child.

Is it safe for kids?

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Do I need to download or install anything?

No. Everything runs in your web browser — there's no app to install and no updates to manage. Just open a game and play.

What devices and browsers work?

Any modern browser — Chrome, Safari, Firefox, or Edge — on a phone, tablet, laptop, or desktop, including school Chromebooks.