Custom Sudoku Maker
Make your own custom Sudoku: tap a cell on the board and enter its number. When your Sudoku board has exactly one solution, you can copy a shareable link — the whole puzzle is stored in the URL.
A free custom Sudoku maker
This is a custom Sudoku builder that lets you design your own Sudoku board from scratch. Place your clues on the grid, and the maker checks in real time whether your custom Sudoku has a single, unique solution — the mark of a fair, solvable puzzle. There's no account and no database: every custom puzzle is encoded directly into a shareable link.
How to make your own Sudoku
- Select a cell on the Sudoku board and type a digit from 1 to 9.
- Keep adding clues — the builder flags conflicts and counts the solutions.
- When the board has exactly one solution, name it and copy your share link.
- Send the link to a friend, or open it yourself to start solving right away.
Why build a custom Sudoku?
A custom Sudoku maker is perfect for setting a specific challenge, designing puzzles for a class or newsletter, or just sharing a board you crafted by hand. Prefer to jump straight in? You can also play a random Sudoku across four difficulty levels, or read how to play Sudoku first.