Sudoku Solver - Solve Any Sudoku Puzzle Instantly
Enter any Sudoku puzzle and get the instant solution.
Tool Interface
Sudoku Solver
Enter any Sudoku puzzle and get the solution instantly.
How to use
Type the known digits into the grid (leave unknown cells empty), then press Solve. Sample loads an example puzzle, Clear empties the grid. The solver checks that the puzzle is valid before solving.
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About This Tool
Frequently Asked Questions (FAQ)
How do I solve a Sudoku puzzle?
Enter the known numbers into the grid and press solve. The tool fills in the complete solution instantly.
How do I enter my puzzle?
Click a cell and type the given digits, leaving blanks empty. Double-check the givens — one wrong digit produces a wrong solution.
What if my puzzle has no solution?
The solver will tell you. That usually means a digit was entered wrong, or the puzzle itself is invalid.
Can it solve hard puzzles?
Yes. The solver handles any valid Sudoku, from easy to the most difficult newspaper-grade puzzles.
Is the Sudoku solver free?
Yes. It is free to use with no signup and no limits.