Sudoku
Fill every row, every column and every 3×3 block with 1–9, using each digit once.
FREE PRINTABLE SUDOKU
Pick a level by how many clues you want, then print a 9x9 sudoku and its answer key. Every puzzle has exactly one solution.
Open generatorTOOL 10
Pick how many clues you want, then print a 9×9 sudoku with its answer key. Every puzzle has exactly one solution, checked by a separate verifier.
Fill every row, every column and every 3×3 block with 1–9, using each digit once.
PRINTABLE SUDOKU GUIDE
Print a 9x9 sudoku on A4 with its answer key, in four levels from easy to very hard. Levels are set by how many clues are already filled in, and the clue count is printed on the sheet.
All 100 puzzles have exactly one solution, checked by a verifier that shares no code with the generator. You never have to guess: every puzzle can be finished by logic alone.
Yes. Print on A4 or save as a PDF, with no account. The answer key prints the same way.
By how many clues are given. Fewer clues means a harder puzzle, and the clue count is shown on the sheet.
Yes, verified for all 100 puzzles by a separate checker. The specific solving techniques required are not guaranteed.
Another puzzle steps through the level in order, so puzzles do not repeat back to back.