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All changes saved Sudoku

Sudoku maker

Pick a size and a difficulty and a sudoku with one solution is generated for you. Play it online, share it or print it.

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Generate the puzzle

Every puzzle comes out with exactly one solution. Roll again until you like the look of it.

Board size

Smaller boards suit younger players — the boxes adapt to the size.

Difficulty

How many numbers stay on the board, and which logic is needed to finish it — not just how much is missing.

0 of 0 given checking…

What fills the cells

The logic never changes — only what the player sees in each cell.

How this generator works

Make your first sudoku

  1. Choose a size

    • Boards run from 4 × 4 to 16 × 16, with the classic 9 × 9 in the middle.
    • Smaller boards suit younger players.

  2. Choose the difficulty

    • It sets how many numbers are given and how hard the logic gets: Easy, Normal or Hard.

  3. Inspect or regenerate

    • A board with exactly one solution is ready the moment you arrive.
    • Regenerate puzzle deals another until you like the look of it.

  4. Play, then share

    • Play shows what players see.
    • Share has the link, the QR code and the print options.

Print as a worksheet

Print the blank sudoku for the class and the solved one for yourself. A picture sudoku prints with its pictures in the cells.

Share it online

One link or QR code opens the sudoku in any browser, with no player accounts. Embedding needs a paid plan.

Save your activity first

Free to build, free to play. No account needed to try it. A free account saves your sudoku and covers 60 player sessions a month. One session is one player opening one activity.

What this maker can do

Pencil notes Included for everyone: players pencil in the values still possible in a cell, the way a paper sudoku is solved.

More possibilities

Ways to use it

All ideas →

A custom sudoku in your own size, with numbers or with your own pictures, for a lesson, a party or a newsletter: start from an example below and make it your own.

Sudoku

Mini sudoku

A 4 × 4 grid with one solution, and each number confirmed as it goes in. Sudoku for ages five and up.

Sudoku Premium

Picture sudoku

The same logic with pictures instead of digits: one of each in every row, column and box.

Sudoku

Daily sudoku

The classic 9 × 9 at mid-week strength: one solution, no guessing, and a fresh board whenever the slot needs one.

Who it’s for

Educators 82 Lessons, revision and a game for the last ten minutes. Publishers 21 A daily games section that brings readers back. Local news sites 19 Puzzles made from your own stories, in minutes.

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