1. Choose your level
Start with easy if sudoku is new to you. Every puzzle has exactly one solution — guessing is never needed.
Play sudoku
Play free sudoku at your level, at your own pace and without time pressure. Choose your level below and fill in the grid — your progress is saved automatically on your own device.
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How to play sudoku
2. Fill in the cells
Tap or click an empty cell and choose a number from 1 to 9. Each number may appear only once per row, column, and 3×3 box.
3. Are you stuck?
Use “Check for mistakes” to review your entries, or ask for a hint: it fills in one cell correctly for you.
Prefer to go through the rules calmly first? Then read our detailed sudoku rules for beginners. And would you rather puzzle with pen and paper? You can also print our puzzles for free as a PDF.
More puzzle fun
Daily Sudoku
A new puzzle every day at midnight, the same for everyone. Come back daily and keep your streak going.
Play today's puzzleSudoku rules
New to sudoku? Learn the rules and handy starter tips in plain language, explained step by step.
Read the rulesFrequently asked questions about sudoku
What exactly is sudoku?
Sudoku is a number puzzle on a grid of 9 by 9 cells. The goal: fill every cell with a number from 1 to 9, so that each number appears exactly once in every row, every column, and every 3 by 3 box. No math is needed — just logical thinking.
Are the puzzles always solvable?
Yes. Every puzzle on BreinPlezier is guaranteed to have exactly one solution that you can find with pure logic. So you never have to guess.
Is my game saved when I close the page?
Yes, your board, level, and time are saved automatically on your own device. If you come back later, you simply continue where you left off. Nothing is sent to us.
What is the difference between the levels?
At easy, 42 cells are already filled in, at medium 34, and at hard 27. The fewer starting numbers, the more you have to reason out yourself.
Can I play with my keyboard?
Yes. Use the arrow keys to move through the grid, type 1 to 9 to enter a number, and erase with Backspace or Delete.