Free Printable Sudoku Puzzles

Printable Sudoku: everything you need to know

Printable sudoku puzzles are the classic way to enjoy the world's favourite logic game. Whether you're on a long flight, relaxing in a café, or looking for a screen-free brain workout, a printed sudoku grid and a pencil are all you need. Our free PDF downloads offer puzzles in every difficulty level — from gentle easy grids for beginners to fiendish expert challenges that will push even seasoned solvers to their limits.

How to Use Our Printable Sudoku PDFs

Click a download and the PDF opens. There is no email form, no account and no watermark on the pages — the whole file is yours, answers included.

1. Choose your difficulty — Pick a PDF labelled Easy, Medium, Hard, or Expert based on your skill level.
2. Download the PDF — Click the download button. The file opens in your browser or PDF reader.
3. Print — Hit Ctrl+P (or Cmd+P on Mac). The pages are US Letter; on A4 paper, choose "Fit to page".
4. Solve with a pencil — We recommend pencil so you can erase; even experts make the occasional slip.
5. Check the answer key — Solutions fill the last pages of each PDF.

Printable Sudoku Difficulty Levels

The four classic sets come from the generator behind our online sudoku, which digs a puzzle only as far as its level’s deductions can still finish it. We ran all 400 printed puzzles through a separate solver to see what each one actually needs:

• Easy — 40 given digits. Naked and hidden singles finish all 100. Good for beginners, for children, or for a puzzle you do not have to concentrate on.
• Medium — 32 given digits. Singles still finish all 100; with fewer digits to start from, finding each one takes longer.
• Hard — 26 given digits. Singles finish 81 of the 100; the other 19 need pointing pairs or box/line reduction. You will want pencil marks.
• Expert — 22 to 25 given digits. Singles finish 78; 16 need pointing pairs or box/line reduction, and 6 a naked pair or triple. None needs an X-Wing: for that, try the Evil and Extreme puzzles online.

The 4×4 set stops at Hard, because a 4×4 grid cannot carry a technique harder than that.

Why Solve Sudoku on Paper?

Digital sudoku is convenient, but pencil-and-paper solving has its own unique advantages:

• Zero screen time — Give your eyes a break from phones and monitors.
• No distractions — No notifications, no temptation to switch tabs. Just you and the puzzle.
• All your own work — Nothing on the page fills a square, flags a mistake or offers a hint, so every digit is a deduction you made.
• Great for travel — A printed sheet works on planes, trains and in waiting rooms: no battery, no signal, nothing to charge.
• Perfect for groups — Print several copies and race friends, family, or classmates.

Printing Tips for the Best Results

1. Use standard paper — Regular 80 gsm paper works fine. Thicker stock is nice but not necessary.
2. Black & white is enough — All our PDFs print perfectly in greyscale, saving your colour ink.
3. Scale to fit — Make sure "Fit to page" is selected in your print settings so the grid isn't cropped.
4. Print double-sided — Put puzzles on the front and solutions on the back to save paper.
5. Laminate for reuse — Laminate a few sheets and use dry-erase markers to solve the same puzzle multiple times.

What's Included in Each PDF

Every download on this page, classic or variant, follows the same plan: a cover page, the puzzles, then the solutions. These numbers come from opening the files, not from a spec:

A cover with the rules, two puzzles to a page, then the answer key from page 52, nine solutions to a page. The variant sets — 4×4 through 25×25, Jigsaw, Killer, Samurai, X-Sudoku and Wordoku — hold 100 puzzles apiece too. The big grids get more room: 12×12 runs to 76 pages, and the 16×16, 25×25 and Samurai sets print one puzzle to a page (126, 151 and 126 pages). That is 43 PDFs and 4,300 puzzles in total, and a solver written separately from the generators checked every one for exactly one solution.

• 100 puzzles, one answer each — Each PDF contains 100 different grids, and every one has exactly one solution.
• Full solutions — Complete answer keys are included so you can check every puzzle.
• Clean grid design — Bold 3×3 box borders and clear numbers for easy reading, even at smaller sizes.
• Difficulty label — Each puzzle is marked Easy, Medium, Hard, or Expert so you know what you're getting into.
• Print-friendly layout — US Letter pages that print on A4 too with “Fit to page”. Nothing depends on colour, so black & white is fine.

Printable Variant Puzzles

The printable collection also includes sudoku variants beyond classic 9×9, each with puzzles and full solutions:

• Printable 4×4 Sudoku — Mini grids for kids, beginners, and quick brain breaks.
• Printable 6×6 Sudoku — Mid-size puzzles that bridge the gap between mini and classic.
• Printable Jigsaw Sudoku — Irregular-shaped regions replace the standard 3×3 boxes.
• Printable Samurai Sudoku — Five overlapping grids for an epic multi-grid challenge.
• Printable Killer Sudoku — Cage sums add arithmetic to the mix.
• Printable X-Sudoku — Diagonal constraints for an extra twist.
• Printable 12×12 Sudoku — The numbers 1–12 in 3×4 boxes.
• Printable 16×16 Sudoku — 256 squares, the numbers 1–16 in 4×4 boxes.
• Printable 25×25 Sudoku — 625 squares, the numbers 1–25 in 5×5 boxes, one grid to a page.
• Printable Wordoku — Nine letters in place of the digits, printed on every puzzle.

Choose a variant when you want a different solving rhythm, from quick mini grids to larger multi-grid challenges.

Prefer to Solve Online?

If you'd rather play on screen, we've got you covered with a range of interactive sudoku games:

• Classic 9×9 Sudoku — The original puzzle with timer, notes, hints, and six difficulty levels.
• 4×4 Sudoku — Quick mini-grids perfect for beginners and kids.
• 6×6 Sudoku — A mid-size grid bridging the gap between 4×4 and 9×9.
• Killer Sudoku — Cage sums add an arithmetic twist to the classic rules.
• Jigsaw Sudoku — Irregular regions replace the standard 3×3 boxes.
• X Sudoku — Both main diagonals must also hold 1–9 exactly once.
• Samurai Sudoku — Five overlapping 9×9 grids solved as one puzzle.
• Wordoku — The same logic with nine letters instead of nine digits.

Or use our free Sudoku Solver to check any puzzle or learn step-by-step solving techniques.