Free Sudoku Online - Thousands of Daily Puzzles
Play free Sudoku online with 23+ game variants! Daily Sudoku, Killer Sudoku, Sudoku X, Kakuro & more. Easy to Expert difficulty. No download - solve web Sudoku puzzles instantly in your browser!
Free Sudoku Puzzles - 23 Game Variants
Play 23 free Sudoku games online! Daily puzzles, multiple difficulty levels, classic & advanced variants. Start solving now!
Daily Mini Sudoku
Play Daily Mini Sudoku for free, every day a new Sudoku (6x6 and 8x8) in 4 difficulty levels. Solve according to the sudoku rules: a number (from 1-6 or 1-8) can only be used once in every row, column or box (3x2 or 4x2). Click once on the numpad to enter a candidate, click twice to enter a solution and click for the third time to remove a number from the cell. You can also use the keypad of your desktop (and arrow keys, del, tab and x). A Sudoku game.
Daily Sudoku
Play Daily Sudoku for free, every day a new Daily Sudoku in 4 difficulty levels. With an archive of several months. Solve according to the sudoku rules: a number (from 1-9) can only be used once in every row, column or 3x3 box. Click once on the numpad to enter a candidate, click twice to enter a solution and click for the third time to remove a number from the cell. A Sudoku game.
Sudoku Siege
Play Sudoku Siege for free, a special Sudoku Game with hints outside the grid. These numbers are the product of the three most adjacent numbers. The normal sudoku rules apply as well in this game: a number may only appear once in each row, column and 3x3 square. A Sudoku game.
Killer Sudoku
Play Killer Sudoku for free, for the extreme Sudoku lovers: Killer Sudoku. Normal Sudoku rules + 1 extra rule: the sum of the cells in a cage must equal the total given for the cage and each digit in the cage must be unique. Tip: the total value of all numbers in a 3x3 box is always 45. A Sudoku game.
Daily Sudoku X
Play Daily Sudoku X for free, everyday four new Diagonal Sudoku or Sudoku X levels. The same sudoku rules apply with one extra rule for the two diagonals: each row, column, 3x3 box and diagonal contains the numbers 1 to 9 only one time. A Sudoku game.
Penny Dell Sudoku
Play Penny Dell Sudoku for free, everyday a new Sudoku puzzle from Penny Dell. Place the numbers from 1-9 once in every row, column or 3x3 box. A Sudoku game.
Daily Kakuro
Play Daily Kakuro for free, every day a new Kakuro challenge in 4 difficulty levels with an archive of several months. Solve the puzzles according to the kakuro rules: the numbers (1-9) entered need to add up to the corresponding clue. A Sudoku game.
Ultimate Sudoku
Play Ultimate Sudoku for free, enjoy this classic Sudoku game with 3 different difficulty levels: easy, medium and hard! Every number (1-9) can only appear once per row, column or 3x3 box. A Sudoku game.
Wordoku
Play Wordoku for free, enjoy this original variant of the classic Sudoku puzzle with letters and words. Every letter can only appear once per row, column or 3x3 box. A Sudoku game.
Daily Kaodoku
Play Daily Kaodoku for free, difficult Sudoku game with Smiley faces. Each of the unique 9 smileys has to appear only once in every 3x3 box, row and column. Every smiley is a combination of 3 different mouths and 3 different shapes. This way you have also other solving techniques then unique smileys. For example: every row, column and 3x3 box has exact 3 square shapes. A Sudoku game.
Classic Sudoku
Play Classic Sudoku for free, try to become a Sudoku Master in Classic Sudoku. Drag the numbers onto the correct spots on the Sudoku grid, following the sudoku rules: a number from 1-9 may only appear once in each row, column and 3x3 box. A Sudoku game.
Sudoku Classic
Play Sudoku Classic for free, 10 levels of classic Sudoku, each new level more difficult. The sudoku rules apply: you can enter numbers from 1 through 9 but every number can only occur once per row, column and 9x9 box. Enter the numbers via the numeric pad on screen or your keyboard. You can delete numbers via the delete button on your keyboard or by entering the same number again via the numeric pad. The game allows you to use pencil marks. Click on the Pencil to add the pencil marks in a cell. There is a hint button that you can use for a maximum of three times per level: it shows the correct and incorrect numbers. A Sudoku game.
MathDoku
Play MathDoku for free, kenKen: Sudoku combined with Math. Follow the Sudoku rules plus the math clues. A Sudoku game.
Sudoku Royal
Play Sudoku Royal for free, try to master Sudoku in 4 difficulties. The common rules of classic Sudoku apply: a number from 1..9 can only appear once in every row, column and 9x9 box. Choose a cell and then click on the number you want to use there. Use the pencil mode to make notes in a cell. A Sudoku game.
Daily Hexnum
Play Daily Hexnum for free, hexNum is a circular Sudoku game with numbers from 1 to 6. Place the numbers in a circle around the grey cells. Like in Sudoku: every number can occur only once in a circle. Click as long as needed on a cell to reach the right number. A Daily game.
Zoobiedoku
Play Zoobiedoku for free, sudoku game with the Zoobies: place all Zoobies. Every Zoobie can be placed only once in every row, column or block. A Sudoku game.
Line Sudoku
Play Line Sudoku for free, play Chain Sudoku in increasing levels of difficulty. In Chain Sudoku, numbers may only appear once in each row, column, and chain (=line). A Sudoku game.
Life Sudoku
Play Life Sudoku for free, every day a new Life Sudoku, there is also an archive of one month. Click on a box and then on one of the digits that appear. To fill in a pencil mark, the option pencil marks must be on and then click on the small square in the corner of each box. Use the Sudoku rules to solve the puzzle: in every row, column and 3x3 box the numbers 1-9 can only appear once. A Sudoku game.
Master Sudoku
Play Master Sudoku for free, become a Sudoku Master in this Sudoku game with 6 levels of difficulty. The numbers 1 to 9 only can appear once in every row, column or 3x3 box. Click on 'Add' to add a number as a pencil mark. A Sudoku game.
Daily Killer Sudoku
Play Daily Killer Sudoku for free, everyday new Killer Sudoku levels in 2 sizes and 3 difficulty levels. Use the normal sudoku rules to fill the grid with the numbers 1 to 9, such that each row, column and box contains each number only once. But on top of that, a Killer Sudoku grid is divided into cages with its own background color. The values of the cells in a cage must sum up to the total for that cage, shown in the cage's top left corner. The same number cannot appear in a cage more than once. Click on a cage to get hints on the possible values in that cage. Tip for the 9x9 sudoku: the total value of all numbers in a 3x3 box is always 45. A Sudoku game.
Flower Sudoku
Play Flower Sudoku for free, drag and place the flower Sudoku pieces on the right spot. Use every flower only once in a row, column and box. A Sudoku game.
Puzlogic Plus
Play Puzlogic Plus for free, sudoku and Kakuro like number game. Solve the levels using the given hints and the fact that a number may only occur once in a row/column. A Sudoku game.
Daily Calcudoku
Play Daily Calcudoku for free, every day a new Calcudoku puzzle. Calcudoku is also know as KenKen. Fill the grid where every number can only occur once per row/column. But the cages (thick bordered box) must produce the given outcome with the given operator. Click on a cell and then once on a number to set a number as a hint, click one more time on a number to set the final solution. A Sudoku game.
Learn About Sudoku - Rules, Variants & Strategies
Everything you need to know about Sudoku puzzles, from basic rules to advanced techniques