How to Play
Fill every row, column, and 3x3 block with digits 1 through 9. Given clue cells stay fixed.
• Headzle Sudoku
Free Online Sudoku Game
Play a relaxing online Sudoku puzzle from Headzle. Choose from Easy, Medium, Hard, Expert, and Master levels, fill the 9x9 grid, use pencil marks, get gentle hints, and enjoy a calm screen-free number puzzle designed for adults and seniors.
Headzle creates relaxing online puzzle games, printable puzzles, and large-print puzzle books for adults, seniors, and screen-free moments.
Play Today's Sudoku
Fill the 9x9 number grid.
Sudoku
Choose today's Sudoku level.
You can play one Sudoku difficulty per day. Today's Headzle Sudoku date is Jun 16, 2026.
Your selected level is saved on this device for today.
Sudoku Features
Use pencil marks, auto-candidates, undo, redo, pause, check, and gentle hints while you solve.
More Headzle Games
Explore Find The Word, Word Search, Word Scramble, Number Search, and future Word Groups.
Free Printable Puzzles
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Headzle links
What is Sudoku?
Sudoku is a 9x9 logic puzzle where every row, column, and 3x3 block must contain the digits 1 through 9 exactly once.
Is Headzle Sudoku free?
Yes. Today's online Sudoku puzzle is free to play.
What difficulty levels are available?
Headzle Sudoku currently supports Easy, Medium, Hard, Expert, and Master levels.
Does every Sudoku puzzle have one solution?
Yes. Headzle verifies that each generated Sudoku puzzle has a unique solution before presenting it.
What is Number Place?
Number Place is another name for the classic 9x9 number puzzle commonly known as Sudoku.
Can I use pencil marks?
Yes. You can use Pencil Mode manually or use Auto-Candidates to fill valid marks.
Can I play on mobile?
Yes. The Sudoku board and number pad are designed for mobile and desktop play.
Can I get printable puzzles too?
Yes. Headzle offers a free printable puzzle pack through the free printable puzzles page.