Create Your Puzzles

SudoCraft generates fresh, logic-solvable sudoku puzzles directly in your browser - nothing is created on a server, and no two puzzles are ever exactly the same. Every grid, from the small 3×3 warm-up to the classic 9×9, is checked to make sure it has exactly one valid solution, so there is always a logical path to solving it without guessing.

Easy puzzles leave more of the original numbers in place, giving you more starting clues to work from. Medium removes more clues and usually needs a bit more scanning across rows, columns and boxes. Hard puzzles start with the fewest clues, so you will often need to hold a few candidate numbers in mind before a cell becomes obvious. Because the generator always verifies a single solution exists, even the hardest puzzles stay solvable through pure logic.

9×9 is the traditional sudoku most people know, using the numbers 1–9 across nine 3×3 boxes. 6×6 is a smaller, faster version with numbers 1–6 in six 2×3 boxes - a good middle ground for younger players or a quick puzzle break. 3×3 is the simplest variant: since a single box already covers the whole grid, it plays like a mini logic puzzle based only on rows and columns, making it a gentle introduction for kids just learning what sudoku is.

Besides classic sudoku, SudoCraft also generates Kropki puzzles (dots between cells mark consecutive or double-value pairs), Samurai puzzles (five overlapping 9×9 grids joined into one large challenge) and Arrow puzzles (circled cells whose digit equals the sum along a connected arrow) - just pick a type from the "Sudoku type" menu before generating. See the How to Play page for the full rules of each type.

Is SudoCraft free to use?
Yes. Generating, playing and downloading puzzles is free, with no account or sign-up required.

Can I print the puzzles I generate?
Yes - each puzzle can be downloaded as a PNG image, or all of them at once as a ZIP file, ready to print at home, in a classroom, or in a puzzle book.

Will I get the same puzzle twice?
Each puzzle is generated fresh with randomized backtracking, so repeats are extremely unlikely, even at the same difficulty and grid size.

What is the difference between Generate and Play?
Generate is for creating and downloading puzzles to print or share. Play lets you solve a sudoku directly on this site, with hints, mistake checking and undo.

What sudoku types does SudoCraft support?
Classic, Kropki, Samurai and Arrow sudoku, each with its own extra rule layered on top of the standard row/column/box logic. Full explanations of every type are on the How to Play page.