Sudoku online
0:00Tap a square, then a number
How to play
Fill the grid so that every row, column and 3×3 box contains the digits 1 to 9 once. The black digits are given. Tap a square and then a number, or type on a keyboard.
Easy and medium puzzles can be solved by finding the only place for a digit, or the only digit for a square. Hard and expert puzzles have fewer starting digits and need more careful notes.
More puzzles
Killer sudokuDaily puzzle and four levelsKakuroCross sums in three sizesSamurai sudokuFive grids that overlapJigsaw sudokuIrregular regionsX sudokuDiagonals count tooMini sudoku4×4 and 6×6 for kids
Questions
Do these sudoku puzzles have one solution?
Yes. Every puzzle was checked by a computer solver, which confirmed that it has exactly one solution.
How many starting digits are there?
Easy puzzles have about 38 starting digits, medium about 32, hard about 27 and expert puzzles have as few as the puzzle allows while still having one solution.
Can I print a sudoku?
Yes, on our sister site sudokuprint.app.