Sudoku generator
Make a printable sudoku
Pick a difficulty and generate. Every grid has exactly one solution and never needs a guess, so there is always a next move to find. Nothing to install and no sign-up.
Show the answer key
Common questions
Does every puzzle have only one solution?
Yes. Each grid is checked for uniqueness before it is shown, so there is exactly one way to complete it. That also means you never have to guess: every step follows from what is already on the grid.
What does difficulty actually change?
The number of given numbers. Easy leaves around 40, medium around 32, hard around 26. Fewer givens means each move depends on more of the grid at once, which is what makes it slower rather than luckier.
Can I get the same puzzle again?
Yes. The same title and difficulty always produce the same grid, so you can reprint an identical sheet rather than keeping the file. Press "Another one" for a different grid at the same settings.