CLASSIC 9×9
Easy starts with 42 clues, Medium with 34, and Hard with 28. Every generated puzzle is checked for a single solution.
Free Online Sudoku
Fill the empty cells and finish a puzzle. Start with classic 9×9 or a quick 6×6.
Preparing your puzzle
How to play Sudoku
- 01
Select an empty cell
Choose an empty cell, then press a number below. You can also use number and arrow keys.
- 02
Check every row, column, and box
The same number cannot appear twice in any row, column, or bold-outlined box.
- 03
Complete the grid
Fill every empty cell correctly to save your result. Use notes and undo when the next move is not obvious.
Three ways to play
QUICK 6×6
A shorter puzzle with 2×3 boxes. Use the digits 1 through 6 and finish a full grid in a few minutes.
DAILY
Get the same 9×9 puzzle for each local calendar date. Your completion streak stays in this browser only.
Sudoku rules
In 9×9 Sudoku, every row, column, and 3×3 box must contain the digits 1 through 9 exactly once. QUICK 6×6 uses the same rule with digits 1 through 6 and 2×3 boxes. Starting clues cannot be changed. PlayMinute checks that every generated puzzle has one solution. Difficulty is grouped by the number of starting clues, so puzzles in the same group can still feel different.
What to check when you are stuck
Find nearly complete lines
If a row or column has only one empty cell, the missing digit is forced.
Write candidate notes
Turn on Notes and add the digits that could fit when a cell has no obvious answer yet.
Narrow down a box
Eliminate rows and columns inside a box until a digit has only one possible cell.
Cross-check, do not guess
Move between the cell's row, column, and box. One confirmed digit often unlocks several more.
Frequently asked questions
Is this online Sudoku free?
Yes. Play free with no sign-up or install. Your current puzzle and personal records stay in this browser only.
How do Notes work?
Turn Notes on, then press a number to add a small candidate to the selected empty cell. On a keyboard, press N to toggle Notes.
Does using a hint affect my record?
A hinted puzzle still counts as completed and keeps a Daily streak. Its time does not update your personal best, so clean runs remain comparable.
When does the Daily Sudoku change?
A new puzzle appears when your device's local date changes. With no account sync, streaks do not carry to another browser or device.
Can I continue after closing the page?
Yes. Entered digits, notes, and elapsed time save automatically. Reopen the game in the same browser to continue. Undo history resets after a reload.