4×4, 6×6 and 9×9
Move from four-symbol beginner grids through compact 6×6 practice to the classic nine-by-nine puzzle without changing tools.
Free Printable Sudoku Generator
Printable Sudoku Generator With Verified Answers 4×4, 6×6 and classic 9×9 puzzles made for paper
Use the printable Sudoku generator to make one puzzle, a classroom worksheet or a 24-puzzle pack. Choose a real difficulty, fit one to six grids on each page and download a clean PDF with answers kept at the end.
Free • No sign-up • Unique solution checked • A4 and Letter • PDF, SVG and PNG
Printable Sudoku Generator With Live PDF Preview
Every change rebuilds the printable Sudoku generator preview. Each grid is checked for one solution, rated with a human-style solving model and paired with the correct answer before export.
The classic grid: nine digits, nine rows, nine columns and nine 3×3 boxes.
Fewer givens and longer dependencies create a balanced everyday puzzle.
Keep the same seed, size, difficulty and puzzle count to reproduce the identical set later.
Unique solutions verified.All 4 Medium puzzles passed a second solution count; givens range from 36–36.
Live print preview
Preparing the print preview…
Preparing the print preview…
This Sudoku maker runs locally in your browser; puzzle settings are never uploaded. Print at actual size (100%)
Why This Printable Sudoku Generator Makes Better Worksheets
A useful printable Sudoku generator must protect puzzle quality as carefully as it handles page layout.
Three grid sizes, not one cramped compromise
Choose 4×4 for a child's first logic grid, 6×6 for a shorter practice round or classic 9×9 for adults and experienced students. The printable Sudoku generator redraws box borders, digits and spacing for the chosen size instead of shrinking the same worksheet until it becomes hard to write on.
A separate answer section that really matches
Every puzzle is counted for exactly one solution before it reaches the preview, and the same validation runs again when pages are built. Puzzle numbers stay attached to their solved grids, while the printable Sudoku generator places all answer pages after the worksheets so teachers can hand out the front section without revealing anything.
Everything in the Printable Sudoku Generator
The controls follow what families, teachers and paper-first solvers actually need from a practical Sudoku maker.
Human-style difficulty
Difficulty combines clue density with the logical steps and dependencies needed to finish, rather than trusting clue count alone.
One to 24 unique puzzles
Build a single quiet-time sheet, a week of practice or a classroom pack. Every numbered puzzle is generated and checked separately.
One, two, four or six per page
Use one grid for large writing space or place six on a page for compact travel packs and paper-saving classroom warm-ups.
Solutions kept at the end
Optional answer pages repeat the numbering and layout after every unsolved worksheet page, making checking fast without spoilers.
PDF, SVG, PNG and print
Download the whole set as vector PDF, export the page in view as SVG or high-resolution PNG, or print directly from the browser.
How to Use the Printable Sudoku Generator
Four choices turn the printable Sudoku generator into a readable, verified worksheet pack.
01
Choose 4×4, 6×6 or 9×9
Start with 4×4 when a child is learning rows, columns and boxes. Choose 6×6 for quicker practice or 9×9 for the classic experience.
- 4×4 uses digits 1–4 and 2×2 boxes
- 6×6 uses digits 1–6 and 2×3 boxes
02
Set a difficulty that means something
Easy begins with more direct placements; Medium lengthens the dependency chain; Hard and Expert require tighter scanning and deeper choices. The printable Sudoku generator rates the finished grid after carving it.
The selected level affects both the clue target and the human-style solution trace.
03
Build the page or the whole pack
Select one to 24 puzzles, then fit one, two, four or six on A4, Letter, A5 or Legal paper. Add name and date lines for classroom worksheets or leave them off for a clean puzzle-book layout.
Use one or two grids per page for large print; four or six works best for travel and compact answer keys.
04
Check the green message, export and print
Wait for unique-solution verification, preview the puzzle and answer pages, then download PDF, SVG or PNG. For the most predictable margins, print the PDF at Actual size or 100%.
Read the printing guidePrintable Sudoku Generator FAQ
Practical answers about free Sudoku PDFs, unique solutions, children's grids, difficulty, answer keys and page layouts.
Is this printable Sudoku generator free?
Yes. The printable Sudoku generator is free, has no account requirement, no email gate, no watermark and no limit on how many sets you create. All generation and export work in your browser.
Does every printable Sudoku puzzle have one unique solution?
Yes. A solution counter checks every grid while clues are removed and rejects any removal that would create two solutions. The complete set is validated again before the printable Sudoku generator builds PDF, SVG, PNG or print pages.
Which Sudoku size is best for children?
Start with 4×4 for children who recognise digits 1–4 and understand that a number cannot repeat in a row. Move to 6×6 when 4×4 feels automatic. Classic 9×9 is usually better after the child is comfortable scanning several groups at once.
How does the printable Sudoku generator decide difficulty?
It uses a clue target, then analyses the finished puzzle with a human-style solver. Direct singles, hidden singles, decision points and dependency depth contribute to the rating. This is more useful than calling every puzzle with the same number of givens equally difficult.
Can I download a printable Sudoku PDF with answers?
Yes. Keep Add separate answer pages selected. The PDF places every unsolved worksheet first and the matching completed grids afterward. Puzzle numbers make each answer easy to pair with the correct grid.
How many Sudoku puzzles can I put on one page?
Choose one, two, four or six. One per page gives the largest cells for children, seniors and pencil marks. Four is a balanced everyday layout, while six saves paper for classroom warm-ups, travel packs and compact answer pages.
Can I make a whole class set instead of one worksheet?
Yes. Set the puzzle count from one to 24. The printable Sudoku generator makes each numbered puzzle separately at the selected size and difficulty, then paginates the set automatically. Change the seed when you want a completely different pack.
Does the printable Sudoku generator support A4 and US Letter?
Yes. It supports A4, US Letter, A5 and US Legal paper in portrait or landscape. The preview follows the exact page ratio. Choose Actual size or 100% in the print dialog to preserve margins and line weights.
What does the Sudoku seed do?
The seed makes generation repeatable. Enter the same seed with the same grid size, difficulty and puzzle count to rebuild the identical set later. Printing the seed in the footer makes a lost worksheet easy to replace.
Should I choose PDF, SVG or PNG?
Use PDF for the complete multi-page puzzle and answer set. SVG is an editable vector page that stays sharp at any scale. PNG is convenient for slides, documents and learning platforms. Direct print uses the same vector page geometry as PDF.
Are my Sudoku settings uploaded?
No. The printable Sudoku generator creates, checks and lays out every grid locally in your browser. The seed, title and worksheet settings are not sent to a server.
What are the basic Sudoku rules?
Fill every empty cell so each row, each column and each outlined box contains every digit exactly once. A 4×4 grid uses 1–4, a 6×6 grid uses 1–6 and a classic 9×9 grid uses 1–9. No arithmetic is required.
Did a grid, rating or export look wrong?
Generate a Verified Printable Sudoku Set
Choose a grid size, real difficulty and paper-saving layout.
Let the printable Sudoku generator verify every unique solution and build the matching answer pages.
Free, private, reproducible from a seed and ready for A4 or US Letter paper.