Play Sudoku Online — Free
Pick your level and start solving instantly. Every puzzle has a single logical solution — no guessing, no signup, no downloads. Play as many free Sudoku puzzles as you like on any device.
New to Sudoku? Start with our step-by-step beginner’s guide, or browse all Sudoku guides and tips.
easy Sudoku
Easy Sudoku is the perfect place to start. Every puzzle is solvable with straightforward logic — scan a row, column, or box, spot the one number that fits, and repeat. There is never any guessing. Play unlimited free easy Sudoku puzzles right in your browser, with no signup and no downloads.
medium Sudoku
Medium Sudoku is where the game opens up. Simple scanning gets you started, but finishing usually means jotting pencil-mark candidates and using techniques like naked pairs and pointing pairs. It is the ideal level once easy puzzles feel automatic. Play unlimited free medium Sudoku in your browser — no signup required.
hard Sudoku
Hard Sudoku is for solvers who want a real challenge. These grids still have a single logical solution — no guessing needed — but reaching it takes full candidate marking and advanced techniques such as hidden pairs, pointing pairs, and the X-Wing. Play unlimited free hard Sudoku puzzles online, no signup and no downloads.