Tic Tac Toe — Online Multiplayer and Smart Bots

A free online tic-tac-toe game with three distinct computer opponents, local two-player mode on one device, and peer-to-peer online rooms joined by a six-character code. Each bot has its own thinking style: a careless Rookie, a Cautious blocker, and a Strategist that never loses.

1
Pick a mode

vs Computer, 2-Player on one device, or an Online room with a friend.

2
Choose difficulty or rules

For the computer mode, pick Rookie, Cautious or Strategist. Toggle Misère if you want 3-in-a-row to lose.

3
Share the link (online)

For an online game, copy the room link or show the QR so your friend can join.

4
Play, rematch, repeat

Tap cells to place your mark. After each game, one tap replays with roles alternated.

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Features

Three bots with different personalities 2-player mode on one device Online rooms by shareable link Misère rule option Stats and win streaks

Do the three bots really play differently?

Yes. Rookie is a weighted-random bot that never blocks; Cautious is a priority-rule engine with calibrated blunders; Strategist runs full alpha-beta minimax with a randomized opening book and a fork-preferring tiebreaker. Watch their first moves — they make completely different choices in the same position.

Can the Strategist be beaten?

No. Tic-tac-toe is a solved game. The best you can do against perfect play is draw. If you want wins, play Rookie or Cautious.

How does the online mode work?

Browsers connect peer-to-peer through PeerJS using our signaling server. Your moves travel directly between the two devices — there are no accounts, just a room code.

What is Misère?

A classic variant where the player who completes three in a row LOSES. The bot's minimax is inverted, so Strategist still plays optimally — for the opposite goal.

Does it work on phones?

Yes. Touch controls, keyboard navigation, numpad 1–9 shortcuts, and screen-reader announcements are all supported.

💡 Want us to improve this tool just for you?

We can — and it's free! Just send us a quick message with your idea. If you'd like to discuss it in detail, leave your email and we'll get back to you. You can stay anonymous.

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