Sudoku Tools
Five small tools for the times you're not just playing. Solve a tough puzzle from a newspaper. Generate a new one. Check if a grid is valid. Get the next move when you're stuck. Each tool runs fully on your device.
Solver
Get the answer to any sudoku.
Type in a puzzle from a newspaper or book and see the finished grid.
Generator
Make a fresh puzzle at any difficulty.
Pick a level and get a new sudoku in one click. Print it or play it.
Checker
Is this a valid sudoku?
Paste a layout to find out if it has one solution, none, or more than one.
Difficulty rater
How hard is this puzzle?
Get a rough difficulty label for any sudoku you've found.
Step-by-step solver
See the next logical move.
Stuck mid-puzzle? Get one move at a time with the technique explained.