Question 1

What is Sudoku Friends?

Accepted Answer

Sudoku Friends (sudokufriends.io) is a free browser-based multiplayer sudoku game. Players can solve classic 9×9 or larger 16×16 puzzles alone or together with friends in real-time private rooms. No account or download is required.

Question 2

Is Sudoku Friends free?

Accepted Answer

Yes, Sudoku Friends is completely free to play. There is no paywall, no signup requirement, and no download — it runs directly in your web browser on desktop and mobile.

Question 3

How does multiplayer sudoku work on Sudoku Friends?

Accepted Answer

Start a new game, choose a difficulty, and share the room link with friends. Anyone with the link can join the same puzzle and play together in real time — either in co-op mode (solving together) or versus mode (racing to finish first).

Question 4

What difficulty levels does Sudoku Friends offer?

Accepted Answer

Six difficulty levels for classic 9×9 sudoku — Easy, Medium, Advanced, Hard, Expert, and Insane — plus four levels for 16×16 sudoku (Easy, Medium, Hard, Expert).

Question 5

How is Sudoku Friends different from sudoku.com?

Accepted Answer

Sudoku Friends focuses on real-time multiplayer play with friends, which sudoku.com does not offer. It also supports 16×16 sudoku (hexadoku) for players looking for a larger, more challenging grid. Both sites are free, but Sudoku Friends has no required signup.

Question 6

Can I play 16×16 sudoku on Sudoku Friends?

Accepted Answer

Yes. Sudoku Friends offers 16×16 sudoku (using digits 1–9 and letters A–G) across four difficulty levels, playable solo or in multiplayer rooms.

Question 7

Does Sudoku Friends have a 1v1 versus mode?

Accepted Answer

Yes. In versus mode each player works on their own copy of the same puzzle; each mistake adds time, and the player with the lowest total time wins. It works on every grid size and difficulty level, free and with no signup.

Question 8

Can you play sudoku with 2 players online?

Accepted Answer

Yes. Create a room, share the link with a friend, and play 2-player sudoku in real time — either co-op (solving the same grid together) or versus (competing 1v1 for the lowest total time, where mistakes add time). More than two players can join as well, and no account is needed.

Question 9

What is co-op sudoku?

Accepted Answer

Co-op sudoku is a multiplayer mode where players work on the same puzzle together in real time, sharing progress until the grid is complete. On Sudoku Friends, co-op is available for every puzzle type and difficulty level, with no signup required.

Free Multiplayer Sudoku Online

Private Game Rooms

Multiple Difficulty Levels

Smart Features

How It Works

Select your difficulty level

Create a private game room

Invite your friends

Have fun!

Ready to Play?

A new layout