Free Sudoku online — unlimited puzzles
Sudogku is a free Sudoku game you can play instantly in your browser. Every puzzle is freshly generated with a unique solution, so you never run out of boards to solve.
Why play free Sudoku on Sudogku?
Most Sudoku sites clutter the board with ads or lock harder puzzles behind paywalls. Sudogku keeps the focus on the puzzle: clean grids, fast input, notes, hints when you're stuck, and a mistake counter so you can learn without frustration.
Choose Easy, Medium, Hard, Expert, or Master — each difficulty uses a fresh generator that guarantees exactly one solution, the gold standard for fair Sudoku.
Features serious solvers expect
Highlight matching numbers and related rows, columns, and boxes. Toggle pencil marks for candidates. Undo mistakes, erase cells, and pause the timer when life interrupts your solve.
Your solo stats and progress charts live on the Me tab. Sign in to sync across devices, or play anonymously with on-device saves.
No install required
Open Sudogku in Chrome, Safari, Firefox, or Edge and start playing. Add the site to your home screen for a full-screen PWA experience that feels like a native Sudoku app — still 100% free.
Frequently asked questions
- Is Sudogku free to play?
- Yes. Sudogku is completely free — play unlimited Sudoku puzzles online in your browser with no download or subscription required.
- Can I play Sudoku with a friend online?
- Yes. Sudogku supports real-time multiplayer Sudoku. Share a room code to play co-op on one puzzle together or compete to fill the most squares.
- What Sudoku difficulty levels are available?
- Sudogku offers Easy, Medium, Hard, Expert, and Master puzzles. Each board is freshly generated with a unique solution.
- Does Sudogku work on mobile?
- Yes. Sudogku is built for phones and tablets. You can also add it to your home screen as a PWA for an app-like experience.