Sudoku grid generator: create infinite challenges

Our sudoku generator allows you to create an infinity of unique and varied sudoku grids. Whether you're a beginner or expert, choose from different sizes (6×6 and 9×9) and difficulty levels to find the perfect challenge. You can even play with letters instead of numbers (Wordoku)!

Sudoku: an essential logic game

Sudoku is a logic puzzle that consists of filling a grid with numbers (or letters) according to simple but demanding rules. The goal is to fill each row, column, and region (block) with all numbers from 1 to 9 (or all corresponding letters) without repetition.

🎯 Sudoku Rules

• Each row must contain all numbers from 1 to 9 (each only once)
• Each column must contain all numbers from 1 to 9 (each only once)
• Each region/block must contain all numbers from 1 to 9 (each only once)
• No repetition: the same number cannot appear twice in a row, column, or region

Why use this generator?

Available sizes

🟦 Sudoku 6×6 (Mini)

Perfect for beginners and children. Uses numbers 1 to 6 with 2×3 blocks. Ideal for learning the rules.

🟩 Sudoku 9×9 (Classic)

The traditional Sudoku size. Uses numbers 1 to 9 with 3×3 blocks. The most popular format.

Difficulty levels

Wordoku: Sudoku with letters

Wordoku is a fun variant of traditional Sudoku where numbers are replaced by letters. Instead of using 1-9, you use A-I. The rules remain identical, but the experience is refreshing and can help develop other cognitive skills.

Educational applications

Tips for solving Sudoku

🔍 Basic techniques

• Elimination: Identify which numbers cannot go in a cell
• Naked singles: If a cell has only one possibility, place it
• Hidden singles: If a number has only one possible place in a row/column
• Block analysis: Examine possibilities in each 3×3 region

🎯 Advanced strategies

• Naked pairs: Two cells with the same two possibilities
• Intersection: Use constraints between rows/columns and blocks
• Logic chains: Follow cascading implications