Free Sudoku Maker (Printable PDF)

Sudoku is the number-placement puzzle that has hooked solvers everywhere: fill the grid so that every row, every column, and every box holds the digits one through nine with no repeats. This free sudoku maker builds a fresh board with exactly one solution every time, so there is never any guessing involved, only steady logic. Choose a difficulty, from a gentle warm-up to an expert brain-bender, generate a brand-new grid in an instant, and play it right on screen with a tap-friendly number pad and a quick conflict check. When the board looks good, download a clean, ink-light PDF together with its separate answer key, ideal for classrooms, waiting rooms, road trips, and quiet evenings. Scroll down to jump straight into a ready-made difficulty pack.

By difficulty

For kids & variants

How to make it

  1. Choose a difficulty, or start from the balanced medium default.
  2. Press Generate to create a fresh grid with one logical solution.
  3. Solve it on screen with the number pad, or download the printable PDF.
  4. The answer key prints on its own page so checking stays quick.

Frequently asked questions

Does every sudoku have just one solution?

Yes. The generator only keeps puzzles that are uniquely solvable, so careful logic always works without guessing.

Which difficulty should I start with?

Easy reveals more given numbers; hard and expert reveal fewer, so begin with medium and adjust from there.

Can I print a batch of different sudoku puzzles?

Yes, open any sudoku below and its download options include a ten-pack of fresh boards plus a version with the answer keys.