PLAY · LEARN · COMPETE · MASTER

Free Sudoku Online
Sudoku Genius Edition

Play Sudoku online free with 25,000+ puzzles, six difficulty levels, daily challenges, world rankings and live multiplayer battles. No signup required.

Play Sudoku freeChallenge a friend

Instant play · Automatic saving · Phone, tablet and desktop · Offline ready

Sudoku Genius Edition game board
NO ADS WHILE YOU THINKFocused, private Sudoku
25,000+

validated offline puzzles across six difficulty levels

NO SIGNUP

start immediately and keep progress on your device

LIVE

anonymous world rankings and free friend battles

NO ADS

while you think, solve a Daily, or compete

TODAY

One Daily. A world of rivals.

Everyone receives the same deterministic challenge. Build a streak, improve your time and compare real results.

Play today’s Sudoku →

LIVE BATTLES

Challenge friends free.

Create a duel or a team room, share one code and solve the same puzzle without requiring an account.

Create a battle →

GENIUS COACH

Learn the logic, not the answer.

Study human-style techniques from singles and candidates through fish, wings and chains.

Open the learning hub →

CHOOSE YOUR CHALLENGE

From your first grid to Genius.

Every difficulty has its own solving expectations, technique guidance and an immediate path back to the board.

easyPlay and learnmediumPlay and learnhardPlay and learnexpertPlay and learnmasterPlay and learn

FREE SUDOKU TOOLS

More ways to solve and improve.

Sudoku SolverValidate and solve a gridSudoku GeneratorCreate a fresh challengePrintable SudokuPrint puzzles and answer keysHow to PlayRules and beginner guidance

OFFLINE FIRST

Your game belongs on your device.

Core Sudoku, notes, undo, themes, statistics and saved progress keep working without an internet connection. Only rankings and live battles need the network.

Download Sudoku Genius

FAQ

Good to know.

Is Sudoku Genius free?

Yes. The browser game and its 25,000 included puzzles are free.

Do I need an account?

No. Your puzzle, settings and statistics are stored locally on your device.

Can I play offline?

Yes. After the first visit, the core game, puzzles, notes and included hints work offline.

How do battles work?

Create a six-character room code, share it with a friend or team, and solve the same puzzle.

How do hints work?

Included hints reveal a safe next step. Genius Coach lessons explain the logic behind techniques.

Where can I download the app?

The verified Windows release is available now. Android is shown as coming soon until its public listing is live.