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Sudoku Generator

Generate fresh Sudoku puzzles at four difficulty levels. Play on screen or print to play later.

  • Runs in your browser
  • No upload on server
  • Free, forever
  1. Set it up
  2. Play
  3. Share
How this works
  1. 1
    Pick a difficulty

    Easy through Expert. Shuffle for a fresh puzzle any time — every one has a unique solution.

  2. 2
    Fill, or pencil-mark

    Click a cell then type 1–9. Toggle Pencil to jot small candidates. Backspace clears a cell.

  3. 3
    Check, hint or print

    Highlight mistakes, take a hint on the selected cell, or print for a paper break.

Watch: pick a difficulty, fill the grid, print
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Arrow keys move · 1–9 types · P toggles pencil · Backspace clears

How this works

    Pick a difficulty and we generate a fresh puzzle with a unique solution. Click any cell to highlight its row, column and box. Toggle Pencil for candidate notes, check mistakes any time, or Print for a coffee-break challenge.

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