How do I solve a sudoku puzzle?

Fill the 9x9 grid so that every row, every column, and each of the nine 3x3 boxes contains the digits 1 through 9 with no repeats. Start with rows, columns, or boxes that already have the most numbers and work out where each remaining digit can go.

What do the difficulty levels mean?

Difficulty is set by how many numbers are given to start. Easy puzzles give you about 42 starting numbers, medium about 33, hard about 28, and expert about 24. Fewer starting numbers means you need more advanced solving logic.

Can I print these sudoku puzzles?

Yes. Every download is a print-ready US Letter PDF with clean black-on-white grids and generous margins. Open the PDF and print as many copies as you like for personal, classroom, or family use.

Are the answers included?

Yes. Each PDF ends with a full answer-key section showing the completed solution for every puzzle, so you can check your work.

Does every puzzle have a unique solution?

Yes. Each puzzle is generated and verified to have exactly one valid solution, so there is never any guessing between multiple possible answers.

Do I need an account to download?

No. There is no signup and no login. Click a difficulty, download the PDF, and print. The ready-made downloads always work.

Free Printable Sudoku Puzzles

Print free sudoku puzzles in four difficulty levels. Every PDF includes dozens of puzzles plus a complete answer key — each puzzle has exactly one solution. No account, no signup, just download and print.

Easy Sudoku 50 puzzles · PDF with answers Great for beginners and quick warm-ups. ~42 starting numbers each. Download PDF → Medium Sudoku 50 puzzles · PDF with answers A balanced challenge for everyday solving. ~33 starting numbers. Download PDF → Hard Sudoku 40 puzzles · PDF with answers Fewer clues and trickier logic for confident solvers. ~28 numbers. Download PDF → Expert Sudoku 30 puzzles · PDF with answers Minimal clues for serious solvers. ~24 numbers and advanced logic. Download PDF →

How these printable sudoku puzzles work

Each download is a ready-to-print US Letter PDF: one puzzle per page with a clean, large grid, followed by a complete answer key. Every sudoku is generated and verified to have exactly one solution, so you never have to guess between two possible answers. Print at home, in the classroom, or on the go — no account and no signup required.

What the difficulty levels mean

Easy — about 42 starting numbers. Great for beginners and warm-ups.
Medium — about 33 starting numbers. A balanced everyday challenge.
Hard — about 28 starting numbers. Trickier logic for confident solvers.
Expert — about 24 starting numbers. Minimal clues and advanced techniques.

Difficulty depends on how many numbers are filled in to start: fewer given numbers means you need more advanced solving strategies.

How to solve sudoku

The rule of sudoku is simple: fill the 9×9 grid so that every row, every column, and each of the nine 3×3 boxes contains the digits 1 to 9 exactly once — no repeats. You never need math or guessing; every puzzle on this page is solvable with logic alone.

Beginner techniques

Scanning rows, columns, and boxes

Pick a digit and scan each row, column, and 3×3 box to see where it can still go. When a box has only one empty cell where that digit fits, you have found a placement. This cross-hatching is the fastest way to fill an easy grid.

Spotting single candidates

Look at one empty cell and rule out every digit already present in its row, column, and box. If only one digit survives, it has to go there. Hunting for these "naked singles" steadily opens up the rest of the puzzle.

Using pencil marks

When scanning stalls, write small candidate numbers in the corner of each empty cell. Seeing all the options at once makes pairs and hidden singles jump out, and it stops you from forgetting a possibility on harder puzzles.

Tip: start with the easy PDFs to build the scanning habit, then move up a level once you can finish without erasing. If you ever get stuck, the full answer key at the back of every PDF lets you check a single cell instead of giving up.

Generate your own sudoku PDF

Want a fresh set? Pick a difficulty and how many puzzles you want, and generate a brand-new printable PDF right in your browser — answer key included. Nothing is uploaded; everything is created on your device.

Want 500+ sudoku in one bundle?

Get a printable Mega Pack with 500+ puzzles sorted by difficulty, plus full answer keys — one tidy download for road trips, classrooms, and rainy days.

Sudoku Mega Pack — coming soon

Bundle in the works — check back soon.

Printable sudoku FAQ

How do I solve a sudoku puzzle?: Fill the 9x9 grid so that every row, every column, and each of the nine 3x3 boxes contains the digits 1 through 9 with no repeats. Start with rows, columns, or boxes that already have the most numbers and work out where each remaining digit can go.
What do the difficulty levels mean?: Difficulty is set by how many numbers are given to start. Easy puzzles give you about 42 starting numbers, medium about 33, hard about 28, and expert about 24. Fewer starting numbers means you need more advanced solving logic.
Can I print these sudoku puzzles?: Yes. Every download is a print-ready US Letter PDF with clean black-on-white grids and generous margins. Open the PDF and print as many copies as you like for personal, classroom, or family use.
Are the answers included?: Yes. Each PDF ends with a full answer-key section showing the completed solution for every puzzle, so you can check your work.
Does every puzzle have a unique solution?: Yes. Each puzzle is generated and verified to have exactly one valid solution, so there is never any guessing between multiple possible answers.
Do I need an account to download?: No. There is no signup and no login. Click a difficulty, download the PDF, and print. The ready-made downloads always work.