Sudoku Online

Sudoku Puzzle is a free online Sudoku game. No registration, play instantly in your browser. The classic mode offers four difficulty levels: Easy for beginners, Medium for steady practice, Hard for experienced players, and Expert for those who seek a real challenge. Additional game modes expand the standard rules: X-Sudoku adds diagonal constraints, Windoku introduces extra regions on the grid, Killer Sudoku requires groups of cells to meet a target sum, and Kropki adds ratio and difference markers between adjacent cells. Every puzzle has exactly one solution, reachable through pure logic — n…

Play Sudoku Online online free, directly in your browser. There is no download, no account and nothing to block — it works instantly on desktop, tablet and mobile, and it is unblocked on school, work and restricted networks. If you enjoy Sudoku Online, the puzzle games below are a great next stop.