Sudoku Printable is a free online generator that produces printable Sudoku puzzles in multiple grid sizes (4×4, 6×6, 9×9, and 16×16 beta), difficulty levels (Easy, Medium, Hard, Evil), and over a dozen variant rule sets, with optional answer keys and flexible paper formats.
What is Sudoku Printable?
Sudoku Printable is a web-based tool that generates Sudoku puzzles and exports them as print-ready PDFs. Users select grid size, difficulty, puzzle count (1–24), paper size (A4, Letter, Legal, A5, Tabloid, A3), font size, and answer display mode (none, appended, or only solutions). The generator also supports variant rule sets such as Diagonal, Windoku, Knight, Jigsaw, Killer, Thermo, and more, each selectable before generating. Puzzles are produced instantly with guaranteed valid solutions; for standard 4×4, 6×6, and 9×9 grids the solution is unique, while 16×16 (beta) puzzles may not always have a unique solution.
Key Features
- Multi-size grids – Choose 4×4, 6×6, 9×9, or 16×16 (beta). Smaller grids suit beginners; 16×16 offers advanced challenge.
- Variant rule sets – Over a dozen twists including Diagonal, Windoku, Odd/Even circles, Knight moves, Jigsaw regions, King moves, Nonconsecutive, Disjoint boxes, Center Dot, Asterisk, Kropki dots, Consecutive bars, Sandwich clues, Thermo, Arrow, Killer cages, Skyscraper, and Greater‑Than signs. Preview the twist before generating.
- Difficulty levels – Easy (36–40 givens), Medium (32–35), Hard (<31), and Evil (minimal givens). Each level is described with typical clue counts.
- Answer key options – Append full solutions to the PDF or print only the answer pages. Omit answers entirely if desired.
- Flexible paper & print – Supports A4, Letter, A5, Legal, Tabloid (11×17), and A3. Choose Small, Medium, or Large font. Standard or Large Print mode for readability.
- Instant generation – Click “Generate” or “New Puzzles” to produce a brand‑new set. Every set is unique.
- No registration – All puzzles are free with no sign‑up required.
Who is it for?
- Teachers and educators – Print classroom warm‑ups or homework using 4×4 or 6×6 easy puzzles, with answer keys for quick checking.
- Parents and homeschoolers – Provide screen‑free logic practice for children; progress from simple 4×4 to 9×9 grids as skills develop.
- Puzzle enthusiasts – Challenge yourself with Hard or Evil standard puzzles, or explore variant rule sets like Killer, Thermo, or Jigsaw for a fresh solving experience.
- Seniors and brain‑training groups – Use medium‑difficulty puzzles as daily mental exercise; large‑print mode improves accessibility.
Use Cases
- Classroom activity – Generate 6 easy 9×9 puzzles on A4 with answers appended. Students solve independently and self‑check against the solution pages.
- Travel entertainment – Download a batch of 12 medium Letter‑size puzzles without answers. Carry a few sheets and a pencil for device‑free downtime.
- Variant puzzle nights – Select the “Killer” ruleset and generate 4 hard puzzles. Cage sums add a new deduction layer, ideal for a puzzle group session.
How does it work?
- Choose your settings – grid size, difficulty, puzzle count, paper size, font, and answer mode. Optionally select a variant ruleset. 2. Click “Generate” – the tool creates a unique set of validated puzzles. 3. Download the PDF or print directly. The live preview updates with every setting change.
Pricing
Sudoku Printable is completely free. No payment or account creation is required. All features – variant rulesets, all grid sizes, answer keys, any paper size – are available without a subscription.
FAQ
Is Sudoku Printable free?
Yes, every puzzle is 100% free. No registration, payment, or limits on how many sets you generate.
