Free Online Sudoku

How it works

Every puzzle is generated on your device and has exactly one solution, so you never have to guess. Use pencil notes for candidates and the hint button when you are stuck: it names the technique to use.

Five difficulty levels

From Easy, which needs simple singles, to Master, which needs advanced patterns. Each puzzle is graded by the techniques it really requires, not only by how many numbers are given.

Daily puzzle and leaderboard

A new puzzle every day, identical for everyone. Finish it, enter a nickname and see where you land among the Top 3, Top 10, Top 100 and Top 1000.

Install it as an app

Add Tap Sudoku to your home screen or desktop from your browser menu. It opens in its own window and keeps working without internet.