Sudoku, beautifully solved.
Free, open-source Sudoku with 100 verified levels, daily puzzles, and a global leaderboard. No account needed to play.
- 100
- 100levels
- 4
- 4difficulties
- 1,100
- 1,100verified puzzles
- Free & open source
- Free & open source
Four ways to play
Every level is verified and ranked, from a gentle warm-up to barely any help at all.
How it works
Three steps from first grid to the top of the board.
Choose difficulty
Pick easy, medium, hard, or expert — or tackle today's daily puzzle.
Solve the puzzle
Fill the grid with logic alone. Notes, undo, and validation keep you in flow.
Climb the leaderboard
Submit your ranked time and see where you land among players worldwide.
Built in the open. Free to play.
Open Sudoku is MIT-licensed, runs on your own Supabase or fully local, and needs no account, no ads, and no tracking. Fork it, self-host it, and make it yours.