Play Sudoku Online - Free
Enjoy a free online Sudoku with a brand-new random puzzle on every game. Pick your difficulty, race the clock, use hints when you get stuck and save your best score to climb the Games Orbit leaderboard.
Top players
Best Sudoku scores on Games Orbit
How to play Sudoku
Sudoku is a logic puzzle played on a 9x9 grid that is split into nine 3x3 boxes. Each row, column and box must contain every number from 1 to 9 exactly once.
Fill every row, column and box
Place the numbers 1 to 9 so that each number appears exactly once in every row, column and 3x3 box.
Start with the givens
Some cells are already filled in. Use them as clues to work out where the remaining numbers belong.
Only one answer fits
Every puzzle on Games Orbit is generated with a single unique solution, so there is always exactly one right place for every number.
Sudoku rules in a nutshell
- Each row must contain the numbers 1-9 with no repeats.
- Each column must contain the numbers 1-9 with no repeats.
- Each 3x3 box must contain the numbers 1-9 with no repeats.
- You can never change the numbers that are given at the start.
Tips to get a better Sudoku score
Scan for the numbers that appear most often and place those first.
Use pencil notes to track which numbers could still fit in a cell.
Look for rows, columns or boxes where only one number is missing.
Play on a harder difficulty for a bigger base score - and finish fast to avoid time penalties.
Frequently asked questions
Is Sudoku on Games Orbit free?
Yes, Sudoku is 100% free to play. You can play unlimited games in your browser with no downloads, no accounts and no paywalls.
How does Sudoku scoring work?
Every solved puzzle earns a score based on the difficulty level, your completion time, the mistakes you made and the hints you used. Finishing faster with fewer mistakes earns a higher score.
Are Sudoku puzzles random?
Yes. Every game generates a completely new puzzle using a random generator, so you will never see the same board twice.
Do I need an account to save my score?
No. Your scores are saved automatically to your browser on your first game and restored every time you come back to Games Orbit.
What difficulty levels are available?
You can choose between Easy, Medium and Hard. Hard puzzles have fewer starting clues, so they take more logic to solve.
More games
New puzzles and games are on the way to Games Orbit.