Tamvoro

Tamvoro is a free Sudoku maker for teachers, parents and puzzle fans. Choose the grid (4×4, 6×6, 9×9 or 16×16), the level (Easy to Expert), how many puzzles and how many per page, then download a print-ready vector PDF with the answer key at the back, or separate puzzle and answer files. Every puzzle is checked for exactly one solution and graded by a logic solver in the browser; nothing is uploaded and there is no account. The site also has ready-made PDFs (easy, medium, hard, kids, large print, classroom worksheets, letter Sudoku, blank grids), a Killer Sudoku maker, a 16×16 giant Sudoku maker with a hexadecimal option, an on-screen player with hints, and a step-by-step solving guide. A seed printed on each page rebuilds the same set later.