Play Tic-Tac-Toe Online

About Tic-Tac-Toe

Tic-Tac-Toe is the timeless pen-and-paper classic, now against a clever computer. You play X, the CPU plays O. Take turns placing marks on the 3x3 grid and try to line up three in a row — across, down, or diagonally. The computer plays a perfect game, so a draw is a win. Can you avoid losing?

How to play

• You are X; tap an empty square to place your mark.
• The computer responds as O.
• Line up three of your marks in a row, column, or diagonal to win.
• Block the computer from making its own three in a row.
• The CPU plays perfectly — force a draw or catch a slip.

Controls: Tap a square on mobile, or click on desktop.

Tips

• Take a corner or the center on your first move.
• Always block the CPU's two-in-a-row before building your own.
• Set up a 'fork' — two threats at once the CPU can't both block.

Is Tic-Tac-Toe free?

Yes, it's a free instant-play browser game with no download.

Can I beat the computer?

The CPU plays a perfect game, so the best you can force is a draw — a well-earned result!

Does it work on mobile?

Yes — just tap the square you want to play.