Play & build custom Sudoku
Solve a fresh puzzle in seconds, or use the custom Sudoku maker to design your own Sudoku board and share it with a link. No sign-up, no storage — your puzzle lives entirely in the URL.
Custom Sudoku maker
Build your own custom Sudoku board: place your clues, confirm there's a unique solution, and copy a link to challenge a friend.
Open the custom Sudoku maker →How it works
- Shareable links: every custom board is encoded into the URL, so sharing a puzzle is just sharing a link.
- Helpful tools: pencil notes, auto-candidates, mistake highlighting, hints and a timer.
- Themes: switch between dark, light and high contrast from the menu up top.
New to the game? Read how to play Sudoku for the rules and solving techniques.