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Fill the 9×9 grid so every row, column and box contains 1–9.
Select an empty cell and pick a number from the pad.
Every row, column and 3x3 box must contain the digits 1–9 exactly once.
You have 3 mistakes.
Play classic Sudoku online for free. Fill the 9x9 grid so that each row, each column and each 3x3 box contains the digits 1 to 9 exactly once. Choose your difficulty, track your time and beat your best score. It is aimed at players aged 8+ and up, and a typical round takes around 10 minutes. If you already enjoy brain-training, number and classic games, you will feel at home here within seconds.
The goal is straightforward. The on-screen instructions walk you through it, and you can start playing with a single click. Controls are intuitive: use your mouse or keyboard on a computer, or tap and swipe on a phone or tablet. Because everything runs locally in your browser, Sudoku reacts instantly and never needs a page reload.
Playing short, regular sessions supports memory, focus and mental agility.
Hard to say? It is rated Medium, aimed at ages 8++ and above, and takes about 10 minutes per session — a good fit for a coffee break, a commute, or a relaxed evening. It works equally well on desktop, laptop, tablet and phone, with no account and nothing to install. Keep an eye on your best score: it is saved on your device so you can measure your progress over time.
No — like most browser games it needs an internet connection the first time. Once the page is loaded it stays smooth even on slower connections.
Yes. Sudoku is completely free, with no paywalls, no subscriptions and no hidden costs.
No. Sudoku runs entirely in your web browser. There is nothing to install and no account to create.
Yes. The game is responsive and touch-friendly, so it works on phones, tablets, laptops and desktop computers.
It is recommended for ages 8+ and is family-friendly, with no chat and no in-game purchases.
A typical round lasts around 10 minutes, so it fits easily into a short break.
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