All Sudoku games
There are 9 Sudoku games on Sudoku Online, 6 difficulty pages, printable puzzles and a solver. All of them are free and run in your browser.
Every puzzle is made when you ask for it and checked to have exactly one answer, so you never need to guess.
Classic rules
The rules you know: every row, column and box holds each number once.
Classic Sudoku
The everyday game, from Easy to Extreme.
Daily Sudoku
Four puzzles a day, the same for everyone.
Different sizes
The same game on a smaller or bigger grid.
Sudoku for Kids
Four numbers, big squares, no game over.
Mini Sudoku
A quick game with the numbers 1 to 6.
Sudoku 16 × 16
The numbers 1 to 16 on a 256 square grid.
Extra rules
Classic Sudoku with one twist that changes how you think.
Killer Sudoku
Few or no numbers to start. Cages tell you their totals.
Jigsaw Sudoku
The boxes are wiggly pieces instead of squares.
Sudoku X
Both long diagonals need 1 to 9 as well.
Seasonal
Classic Sudoku dressed for the time of year.
Classic Sudoku by difficulty
Each page opens the classic game at that level and explains what the level asks of you.
Easy Sudoku
Start on Easy and switch any time.
Medium Sudoku
Start on Medium and switch any time.
Hard Sudoku
Start on Hard and switch any time.
Expert Sudoku
Start on Expert and switch any time.
Evil Sudoku
Start on Evil and switch any time.
Extreme Sudoku
Start on Extreme and switch any time.
Make pages of puzzles to print or save as a PDF, with the answers at the end.
Printable Sudoku
Pages of puzzles from Easy to Extreme, with answers at the end.
Printable Killer Sudoku
Cages and totals, drawn clearly for paper.
Printable Sudoku for Kids
4 by 4 and 6 by 6 grids for young solvers.
Blank Sudoku Grid
Empty grids to copy a puzzle or make your own.
Tools
Coming soon
These are next on our list.
Hyper Sudoku
Four extra shaded boxes that also hold 1 to 9.
Coming soonEven Odd Sudoku
Shaded squares must hold an even number.
Coming soonThermo Sudoku
Numbers rise along each thermometer.
Coming soonArrow Sudoku
The numbers on an arrow add up to its circle.
Coming soonSandwich Sudoku
Clues give the sum between the 1 and the 9.
Coming soonSamurai Sudoku
Five grids joined at the corners.
Coming soonNew to Sudoku?
Start with Sudoku for Kids or Easy Sudoku, and read how to play. When you want a change from the classic game, Sudoku X is the gentlest twist and Killer Sudoku the most different.