Sudoku Generator

Generates sudoku puzzles at a chosen difficulty with a guaranteed unique solution, printable as PDF.

🔒 Runs entirely in your browsersudokupuzzleprintgenerator

Difficulty

34 clues to start from.

Solve a grid you already have

Paste 81 cells — nine rows of digits, with 0 or . for a blank.

Every generated puzzle is checked for uniqueness as it is built: a clue is only removed if the grid still has exactly one solution. 17 is the proven minimum number of clues for a unique solution — a result from an exhaustive computer search in 2012 — so nothing here goes near it.

Feed it from

Maze Generator

Generates a maze at any size with a chosen algorithm, exported with or without the solution path.

Runs entirely in your browser

These accept what this tool produces, so the result can go straight in.

Images to PDF

Combines images into a single PDF with page size, orientation, margin and ordering control.

Runs entirely in your browser

Maze Generator

Generates a maze at any size with a chosen algorithm, exported with or without the solution path.

Runs entirely in your browser

N-up / Multiple Pages Per Sheet

Lays 2, 4, 6 or 9 pages onto each sheet with adjustable margins and cut marks.

Runs entirely in your browser

Zodiac Compatibility (궁합)

Two birth dates give two animal signs and two day stems. Reports the exact relation between them — 삼합, 육합, 충, 원진, 형, 파, 해 — and the five-element relation of the day stems, each with the traditional verdict.

Runs entirely in your browser