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Printable Sudoku

Generate printable Sudoku puzzles and print them at home. Pick a difficulty from easy to expert, print on Letter or A4, and add the answer key on a second page if you want it. Every click makes a fresh grid with exactly one solution, so a full puzzle book is minutes away.

Built & reviewed by the TurboTeamTools team · Updated September 2026 · 0 uses on this device

Printable Sudoku tool

Sudoku

How to use it

  1. Choose a difficulty from easy to expert, and click New puzzle until you like the grid.
  2. Tick the answer key box if you want the solution printed on a second page.
  3. Pick Letter (8.5 × 11 in) or A4 (210 × 297 mm) and click Print.
  4. Set the scale to 100% or Actual size, never Fit to page; print double-sided when the answer key is included.
  5. Check the preview, then print. Click New puzzle and print again to build a batch.

Popular presets

These links open the printable Sudoku generator at a set difficulty. A brand-new puzzle is generated on every load, so the same link gives a different grid each time:

Worked example

Input: Medium difficulty
→
Result: A balanced puzzle with about 33 given numbers
Input: Expert
→
Result: Around 23 givens for a real challenge

Specifications

DifficultyCells removed (up to)Clues left (about)Techniques neededPaper
Easy4041Scanning for single candidatesLetter 8.5 × 11 in or A4 210 × 297 mm
Medium4833Scanning plus pencil marksLetter or A4
Hard5427Naked pairs, box-line reductionLetter or A4
Expert5823Full candidate work, pointing pairsLetter or A4
Answer key0All 81 filledPrints on its own second pageLetter or A4, 0.5 in / 10 mm margin

A fresh, valid puzzle every time

Each puzzle is built from a complete, randomly generated solution grid. Numbers are then removed one cell at a time, and a cell is cleared only if the puzzle still has exactly one solution. That check runs on every removal, so you never get an ambiguous grid where two different answers both fit. Every puzzle can be solved by logic alone, and the answer key is the one true solution.

How difficulty works

The difficulty setting controls how many cells the generator tries to remove: up to about 40 for easy, 48 for medium, 54 for hard and 58 for expert. Because a cell stays filled whenever removing it would create a second solution, the final count varies a little, and the actual number of clues is printed in the puzzle title. Easy puzzles leave around 41 givens and can be solved by scanning rows, columns and boxes. Expert puzzles get down to the low twenties, where you rely on candidate lists and techniques like naked pairs and pointing pairs. Random generation with a uniqueness check produces a natural range of puzzle styles, so no two grids feel the same.

Printing and solving on paper

Printing beats solving on a screen for many people: you can pencil in candidates, erase, and work away from a device. The grid prints with bold lines around each 3 × 3 box and cells large enough for a pencil, on Letter or A4 at 100% scale. Tick the answer key box and the solution prints on its own second page so it does not spoil the puzzle. A new grid is one click away when you want another, and nothing is stored or sent to a server, so you can build a stack of puzzles for a trip or a class in a few minutes.

Common uses

  • Daily brain exercise on paper
  • Classroom and travel activities
  • Substitute-teacher and early-finisher work
  • Puzzle books you assemble yourself
  • Waiting-room and quiet-time entertainment

Which version to choose

  • Easy grids suit kids and first-time solvers who are still learning the rules.
  • Medium is the with-your-coffee difficulty for most regular players.
  • Hard earns its name once you are comfortable penciling in candidate numbers.
  • Expert, near 23 clues, rewards solvers who enjoy naked pairs and pointing pairs.
  • Print a mixed-difficulty stack for travel, waiting rooms or a classroom early-finisher folder.

Related tools

Printable Tic-Tac-Toe prints a page of quick two-player games for when a Sudoku is too much.

Printable Multiplication Chart turns the same printer time into math practice.

Printable Graph Paper makes squared paper for working candidates out on the side.

Frequently asked questions

Yes. Each puzzle comes from a complete valid solution, and cells are removed only while the grid keeps exactly one solution. It can always be solved with logic, and the answer key is the only correct answer.
Harder levels remove more starting numbers: up to about 40 cells for easy, 48 for medium, 54 for hard and 58 for expert. That leaves roughly 41, 33, 27 and 23 clues, and the exact number is shown in the puzzle title.
A properly made one does, and every puzzle here is checked for that. A grid with two or more solutions is considered faulty because at some point you would have to guess. The uniqueness check is what makes the puzzle fair.
Seventeen. Mathematicians showed in 2012 that no valid puzzle with 16 clues exists. Expert puzzles here have around 23 clues, which is already very hard; puzzles near 17 are rare and demanding.
Start by scanning each row, column and box for cells with only one possible number. When that stalls, pencil small candidate numbers into the empty cells, then look for pairs and triples that rule out options elsewhere. Never guess; a correct puzzle always has a logical next step.
Yes. Tick the answer key option and the solution prints on a separate second page so it does not give the puzzle away. Leave it unticked to print just the puzzle, then tick it later and print only page two if you get stuck.
Click New puzzle. A fresh grid is generated from a new random solution in a moment, so you can print as many as you like. Each one is checked for a unique solution, and the clue count in the title tells you how hard it turned out.
One per page. Generate, print, then click New puzzle and print again. Saving each one as a PDF from the print dialog is a quick way to build a batch for a trip or a classroom.