Rules
How to play Sudoku
Fill the 9x9 grid so every row, column, and 3x3 box contains each digit from 1 to 9. A move is wrong when a digit repeats in one of those three areas.
Free online Sudoku
Play Sudoku
A calm daily board with notes, hints, streaks, and beginner-friendly practice.
DifficultyEasy
Mistakes0/3
Time00:00
Tips
Beginner solving tips
Start with rows, columns, or boxes that already contain many numbers. Scan for missing digits, use notes for candidates, and place a number only when it has one valid home.
Printable
Printable Sudoku puzzles
Print a puzzle for offline solving, classroom warmups, travel, or a quiet screen-free break. Each printable page should include the puzzle, answer key, difficulty, and date.
Solver
Sudoku solver
When a puzzle gets stuck, a good solver should show the next logical step and explain why it works, instead of only revealing the final completed grid.
Free puzzles
Play free Sudoku online every day
Choose a difficulty, solve at your pace, and come back for a fresh daily challenge. The board supports notes, hints, mistake tracking, and a timer for players who want a little extra focus.