Free printable sudoku
PDFs sized for A4 or US Letter, one to six puzzles a page, with a large-print option and answers on separate sheets at the back. Free, no sign-up, no watermark.
| 8 | 4 | 9 | ||||||
| 1 | 3 | 4 | ||||||
| 9 | 8 | 2 | ||||||
| 3 | 2 | 1 | ||||||
| 4 | 1 | 5 | 7 | |||||
| 5 | 6 | 3 | ||||||
| 4 | 3 | 5 | ||||||
| 4 | 5 | 7 | ||||||
| 7 | 6 | 3 |
What you get
- Real PDFs, not images — they print crisply at any size.
- Answers on separate pages at the back, so a sheet can be handed out without them.
- Large print for anyone who wants bigger digits and heavier rules.
- No watermark, no sign-up, no limit.
The sample beside this has 28 clues and is a real puzzle from the same bank the PDFs draw on.
Every puzzle is solvable by logic
This matters more on paper than on screen. There is no undo on a printed sheet, so a puzzle that secretly needs guessing wastes the whole thing — and a surprising number of free printable sudoku do, because they are generated by removing clues until the puzzle has one solution and stopping there.
Having exactly one solution is not the same as being solvable by reasoning. Across a sample of random puzzles built that way, better than one in three could not be finished by any human technique — they have a unique answer that can only be found by trial and error.
Ours are checked both ways: one solution, and a complete logical path to it using only techniques the difficulty promises. Nothing here ever needs a guess.
Which difficulty?
- Very Easy pure scanning, nothing but singles
- Easy adds locked candidates and pairs
- Medium adds triples and quads, and fewer clues
- Hard needs an X-Wing or an XY-Wing
- Expert needs colouring, a Swordfish or an XYZ-Wing
- Master needs an XY-chain
Prefer to play on screen? Every difficulty is playable here, with hints that name the actual technique — and there is a reference for every solving technique with worked examples.