Sudoku

Free sudoku that is calm and good for your brain: no ads, no sign-up, no timer unless you want one. Pick your difficulty, switch on large print, and use a hint that shows you the next logical step instead of just giving the answer. A classic 9×9, a quick 6×6, and a fresh daily puzzle — on your phone or your computer.

Play sudoku

How to play

  1. Fill the grid so every row, column and 3×3 box contains 1 to 9, with no repeats.
  2. Turn on Notes, pencil in every candidate and work the grid down as far as patterns and chains will take it.
  3. At the wall, pick a cell with two candidates, assume one and fill in what it forces. If the grid contradicts itself, the other one is the answer.
  4. Repeated numbers are highlighted gently and nothing ends the run, so erasing a line of reasoning costs nothing. The Hint covers the simple steps only.

All sudoku games

Logic

Sudoku

Classic 9×9 sudoku — relaxed, with a hint that teaches.

Play → Logic

Easy Sudoku

Gentle 9×9 puzzles with plenty of numbers already filled in.

Play → Logic

Hard Sudoku

Fewer given numbers, longer chains of deduction — 9×9 grids that make you work.

Play → Logic

Expert Sudoku

Every grid turns on a pattern in the pencil marks — a wing, a fish, a rectangle.

Play → Logic

Evil Sudoku

Every grid has a knot that only a chain of linked pencil marks will untie.

Play → Logic

Extreme Sudoku

Past every pattern, a wall — assume a candidate and follow it until the grid breaks.

Play → Logic

Mini Sudoku

A gentle 6×6 sudoku — perfect for a quick game or large print.

Play → Logic

Daily Sudoku

One fresh 9×9 puzzle a day — the same for everyone.

Play → Logic

Killer Sudoku

Sudoku with cages that must add up — no starting numbers needed.

Play →

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Solve or print a sudoku

Why play sudoku?

Sudoku is pure logic — no math, no luck. Every puzzle is solvable by reasoning alone, which makes it a satisfying daily workout for concentration, working memory and patient, step-by-step deduction.

JuJu keeps it calm and good for you: no ads, no account, no clock ticking down. Every puzzle has exactly one solution, the hint teaches the technique instead of solving it for you, and a large-print mode keeps the grid easy on the eyes. Your progress stays on your device.

Frequently asked questions

Is this sudoku free, with no ads or sign-up?

Yes. Every sudoku is free to play in your browser — no ads, no account, no installation. Your progress is saved on your own device.

Does every puzzle have a unique solution?

Yes. Every puzzle has exactly one solution, so it can always be solved by reasoning rather than luck. On the extreme grids that reasoning includes assuming a candidate and following it until the grid contradicts itself.

Is there a timer?

No timer unless you want one. Sudoku here is relaxed by default — there is no countdown and no 'game over'. You can switch a timer on if you like to track your time.

Is the daily sudoku the same for everyone?

Yes. Everyone gets the same daily puzzle, and it refreshes every 24 hours.

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