Sudoku Online
About Sudoku Online
Sudoku Online is a browser-based version of the classic number puzzle. You fill a grid with numbers so that each row, column and box follows the rules of sudoku. It runs directly in your browser on phone or computer, with no download required, letting you play a familiar puzzle whenever you want a mental challenge.
How to play Sudoku Online
Fill the empty cells in the grid with numbers so that every row, every column and every smaller box contains each number only once. Some cells already have numbers filled in as starting clues. Click or tap a cell to enter a number, then continue until the whole grid is completed correctly according to these sudoku rules.
Tips for playing Sudoku Online
- Start with the rows, columns or boxes that already have the most numbers filled in, since they leave fewer options to figure out.
- Look for cells where only one number could possibly fit before guessing at cells with more possibilities.
- Double check each row, column and box as you go to catch mistakes early rather than at the end.
Frequently asked questions
Is Sudoku Online really free to play?
Yes, it is free to play directly in your browser with no download required.
Do I need to download anything to play Sudoku Online?
No, it runs in your browser on phone or computer, so no download or installation is needed.
What are the basic rules of Sudoku Online?
Each row, column and box in the grid must contain every number only once, and you fill in the empty cells based on the starting clues already shown.
