Sudoku Generator

Generate and print Sudoku puzzles

Pick a difficulty and get a brand-new 9×9 Sudoku puzzle every time. Easy puzzles start with 36 given numbers, medium with 30, and hard with 24 — fewer givens means more deduction. Each puzzle is generated from a complete, valid solution, so every blank has exactly the digit shown in the answer key. Press New Puzzle for another grid, or Print to send a clean, controls-free copy to your printer.

Everything runs entirely in your browser. No account, no limits, and nothing is ever uploaded — generate as many puzzles as you like for classrooms, waiting rooms, road trips, or a quiet evening. Reveal the solution any time with the Show Solution toggle, then hide it again to keep solving.

How to solve Sudoku

Fill the grid so that every row, every column, and each of the nine 3×3 boxes contains the digits 1 through 9 exactly once. Start by scanning rows, columns, and boxes for digits that can only go in one place, then work through the harder cells by elimination.

FAQ

Does every puzzle have a solution? Yes. Each puzzle is carved out of a fully solved grid, so a valid solution always exists and is shown in the answer key.

What is the difference between easy, medium, and hard? Difficulty is set by how many numbers are given at the start — 36 for easy, 30 for medium, and 24 for hard. Fewer givens require more logical steps.

How do I print just the puzzle? Click Print. The page automatically hides the buttons and controls so only the grid prints. Use Show Solution first if you also want the answer key on the page.

Is anything uploaded or stored? No. Puzzles are generated locally in your browser and never sent anywhere.