Play free sudoku online

Sudoku Nonet is a calm, free sudoku you can play right in your browser. No sign-up, no ad walls: just a clean 9×9 grid, a fresh daily sudoku and thousands of puzzles in five levels, from easy sudoku for a relaxed break to expert and master puzzles that really make you think.

Features

• Daily challenge – one new puzzle a day, with a calendar and streaks.
• Five difficulty levels – Easy, Medium, Hard, Expert and Master, each with a unique solution.
• Pencil notes – jot down candidates; they clear themselves as you fill in numbers.
• Hints that explain – stuck? A hint shows why the digit fits and names the technique; undo as often as you like.
• Statistics – best times, win rate and streaks per level.
• Works offline – install it on your phone like an app; dark mode included.

How to play sudoku

Fill the grid so that every row, every column and every 3×3 box contains the digits 1 to 9 exactly once. Start where a row, column or box is almost full and work from there. Read the full guide with rules and solving tips.

Frequently asked questions

Is Sudoku Nonet free?

Yes. Every puzzle is free and you don't need an account. There are no banners or pop-ups: the first hint in every puzzle is free, after that a short video gets you another one, and the same goes for playing on after three mistakes. Offline, all of it is free.

Is there a new sudoku every day?

Yes. The daily sudoku is the same for everyone and gets harder through the week: gentle on Monday, toughest on Saturday.

Can I play sudoku offline?

Yes. Add Sudoku Nonet to your home screen and it works without an internet connection, on phone, tablet and desktop.

Which difficulty levels are there?

Five: Easy, Medium, Hard, Expert and Master, graded by the solving techniques each puzzle needs. Easy and Medium are open from the start; win a puzzle to unlock the next level. Every puzzle has exactly one solution.