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Sudoku

Solve a classic 9×9 Sudoku by logic alone — no guessing required.

What this tool does

Sudoku helps you solve a classic 9×9 Sudoku by logic alone — no guessing required.

What you get

Sudoku produces a direct output in this page and keeps all processing on your device, with nothing uploaded to our servers.

Free to use, no watermarks, runs in your browser—nothing uploads to our servers

Fill the grid so each row, column, and box contains 1–9 without repeats.

Report a bug

If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.