How do I play Sudoku?

Fill the 9×9 grid so that every row, column and 3×3 box contains the digits 1–9 exactly once. Tap a cell then tap a number to place it.

Is this Sudoku game free?

Yes, completely free with no registration, no download and no ads.

Does Sudoku save my progress?

Yes. Your current puzzle, timer and stats are automatically saved in your browser so you can continue where you left off.

What difficulty levels are available?

Easy, Medium and Hard. Easy puzzles have more pre-filled numbers and give you 5 hints and 5 lives.

Free Sudoku — Play Online | Easy, Medium & Hard Puzzles

Free Sudoku Puzzle Game — Play Online

Welcome to Sudoku Pure Focus — a free, fast and ad-free Sudoku game you can play directly in your browser on any device. No download, no account required.

How to Play Sudoku

The goal of Sudoku is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids contains all of the digits from 1 to 9. Tap or click a cell, then tap a number on the number pad to place it.

Difficulty Levels

Easy Sudoku — More pre-filled numbers, 5 hints and 5 lives. Perfect for beginners.
Medium Sudoku — A balanced challenge for casual players.
Hard Sudoku — Fewer givens, requires advanced logic. For experienced solvers.

Features

Pencil / notes mode to mark candidate numbers
Unlimited undo
Hint system
Automatic progress save
Dark mode and Light mode
Works on Android, iPhone and desktop

Frequently Asked Questions

Is this Sudoku free?: Yes, completely free with no ads and no sign-up.
Does it work on mobile?: Yes, the game is fully optimized for Android and iPhone touchscreens.
Will my game be saved?: Yes, your puzzle and stats are automatically saved in your browser's local storage.
How many puzzles are there?: 60 hand-verified puzzles (20 per difficulty) plus an unlimited procedural generator.

SUDOKU