Free Sudoku Puzzles Online
4×4, 6×6 & 9×9 Sudoku. Easy, medium & hard difficulty. Daily challenges. No login needed!
🌅 Today's Daily Sudoku
A new 9×9 puzzle every day. Come back daily to keep your streak!
Choose Your Sudoku
4×4 Sudoku
easyKidsPerfect for beginners and kids. A 4×4 grid with numbers 1-4.
6×6 Sudoku
easyA step up from 4×4, perfect for intermediate players.
9×9 Sudoku (Easy)
easyThe classic 9×9 sudoku for casual players.
9×9 Sudoku (Medium)
mediumA challenging 9×9 sudoku for experienced players.
9×9 Sudoku (Hard)
hardExpert-level 9×9 sudoku for advanced players only!
Killer Sudoku
hardAdvanced variant with caged regions and sums. The ultimate challenge!
How to Play Sudoku
Fill the Grid
Every row, column, and box must contain each number exactly once.
Use Logic
No guessing needed — every puzzle has a unique solution you can find by logic alone.
Start Easy
Beginners should start with 4×4 or 6×6 puzzles before moving to 9×9.
Frequently Asked Questions
Is Sudoku good for your brain?
Yes! Sudoku improves logical thinking, concentration and memory. Regular play has been linked to a reduced risk of dementia.
How long does a Sudoku puzzle take?
Easy 9×9 puzzles take 5-15 minutes. Hard puzzles can take 30-60 minutes. 4×4 puzzles take about 1-2 minutes.
Can kids play Sudoku?
Absolutely! Our 4×4 Sudoku is perfect for children aged 6+ and teaches logical thinking in a fun way.