Sudoku
Each row, column and 3×3 box holds the digits 1–9 exactly once. Slow down. Notice. Place.
Difficulty
Sudoku: a quiet puzzle for a busy mind
Fill the 9 by 9 grid so every row, every column and every box holds the numbers 1 to 9.
5 to 20 minutes. Free. No account.
All free toolsIt is slow, quiet work. Pick a level and take your time. Your best time stays in this browser only.
How it goes
- Pick easy, medium or hard.
- Tap a square, then tap a number.
- Fix any red squares. Finish the grid.
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Want more than a few minutes?
InnerOS is an app for parts work. You write what is on your mind, and your parts answer one at a time.
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