This free Sudoku Solver is a tool designed to help solve any Sudoku puzzle, regardless of its difficulty. Its goal is to help all players wave goodbye to the frustration of being unable to crack a grid and to assist those struggling to find where they might have made a mistake. This online Sudoku Solver is free and can help you solve any grid, including the Sudoku puzzles you can find on our website or puzzles from other digital or printed external sources.
Since Sudoku puzzles can only have one possible solution, this solver can also be useful for checking if a grid is valid or if it might have an error. In the latter case, this tool will inform the user that there is more than one possible solution and will display all of them.
To use this tool, you just need to input the known numbers into the grid and press “Solve Sudoku.” You must pay attention to the position of the numbers you are inputting. Writing a digit in the wrong cell will completely change the grid’s solution, assuming a solution is even possible in that case.
Inputting the numbers from the pre-filled cells will suffice to solve the puzzles. However, you can also input a partially solved grid to confirm your own answers.