Games tool
Free Sudoku Online — Unique Puzzles
Choose easy, medium or hard, then fill each row, column and 3×3 box with the numbers 1–9 once each.
Runs in your browser. No upload.
Use arrow keys to move between cells. Use 1–9 to enter a number.
Choose a number
The puzzle is generated in this browser and is not saved when you leave.
About this tool
Free Sudoku Online — Unique Puzzles made simple.
Each puzzle is generated locally and checked to have one solution. Notes, hints and answer checks stay in this tab; your game is not saved when you leave.
Common questions
About Free Sudoku Online — Unique Puzzles.
How do I use Sudoku online?
Choose easy, medium or hard, then fill each row, column and 3×3 box with the numbers 1–9 once each.
Is my data uploaded to a server?
No. This tool runs locally in your browser. Your input is not uploaded.