How to use sudoku generator & checker
Generate a nine-by-nine Sudoku with a unique solution, enter your answers, check conflicts and print a puzzle or solution.
- Enter your own values or choose a supported file.
- Adjust the options and run the tool.
- Review the result, then copy, export or save it when available.
Try this next
Generate a medium puzzle, fill a few cells and use Check to identify row, column or box conflicts.
Difficulty reflects the number of removed clues, not a certified human-solving rating. The generator checks uniqueness before removing each clue.
Questions, answered.
Is sudoku generator & checker free to use?
Yes. This tool is part of Nepocore’s free browser toolkit. There is no paid tier, file-download gate or application account required.
What should I check before using the result?
Difficulty reflects the number of removed clues, not a certified human-solving rating. The generator checks uniqueness before removing each clue.
Does this tool upload my files or text?
The tool processes its input in your browser. File contents and text are not sent to a processing server. See the privacy page for local storage and hosting details.