Multiple Modes
Sliding mode where marks disappear, or Expanding mode with growing boards
Online PvP
Real-time matches against players worldwide with WebSocket technology
Ranked Play
Climb the ladder, earn ranks, and compete for the top spots
Free Online Multiplayer Tic-Tac-Toe
Infinite Tic-Tac-Toe (Infinite TTT) is a free, browser-based multiplayer tic-tac-toe game with two unique modes — Sliding (marks disappear after three placements, eliminating draws) and Expanding (board grows from 3×3 to 5×5 across rounds) — plus ranked Elo matchmaking, AI practice bots, friend challenges, private rooms, live spectating, and match replays.
Sliding Mode
Dynamic 3×3 board — marks slide off after three placements. No draws, ever.
Expanding Mode
Board grows each round from 3×3 to 5×5. Win N-in-a-row on an N×N board.
Frequently Asked Questions
- What is Infinite Tic-Tac-Toe?
- Infinite Tic-Tac-Toe (Infinite TTT) is a free, browser-based multiplayer tic-tac-toe game with two unique modes — Sliding (marks disappear after three placements, eliminating draws) and Expanding (board grows from 3×3 to 5×5 across rounds) — plus ranked Elo matchmaking, AI practice bots, friend challenges, private rooms, live spectating, and match replays.
- Is Infinite Tic-Tac-Toe free to play?
- Yes. Infinite Tic-Tac-Toe is completely free to play in your browser with no download. You can play quick matches, ranked matches, AI practice and two-player games on one device without an account. Signing in is only needed for features that have to persist across devices — private rooms, the friends list, direct challenges and profile history.
- How is Sliding mode different from regular tic-tac-toe?
- In Sliding mode, each player can only have 3 marks on the board at once. When you place a 4th mark, your oldest mark disappears. This prevents draws and creates dynamic, fast-paced games.
- Can I play tic-tac-toe online with friends?
- Yes. Create a private room, share an invite link, or challenge friends directly from your friends list. You can also play ranked or casual matches against random opponents worldwide.
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