Free Connect Four
Get four in a row vs the computer.
What is the Connect Four?
Connect Four looks like a children's game and plays like a duel: every disc you drop threatens a line and blocks one, and a single lapse hands your opponent four in a row.
Play it free here against a sharp computer opponent or a friend on the same screen.
Last updated: Aug 14, 2026
What does this tool do?
You take turns dropping colored discs into a seven-column grid, and they stack from the bottom up.
The first to line up four of their discs — horizontally, vertically or diagonally — wins; against the computer you'll face a genuine strategic challenge.
Key features
Smart AI
A computer that plans ahead.
2-player mode
Play a friend locally.
Classic 7×6 grid
The real Connect Four board.
Instant
No setup, just drop and play.
Private
Runs in your browser.
Example
Common use cases
- Friends — Quick competitive rounds.
- Families — A game kids and adults both enjoy.
- Strategy fans — Outthink the computer.
- Kids — Learn planning and patterns.
- Commuters — A sharp mini-game.
- Parents — Play with a child.
- Break-takers — A five-minute duel.
- Casual gamers — Simple rules, real depth.
Benefits
- It offers a genuinely challenging AI.
- It's great head-to-head with a friend.
- It's instant with no setup.
- It runs entirely in your browser.
Tips
- Play the center column early — it touches the most lines.
- Always block an opponent's three-in-a-row.
- Create two threats at once so they can't block both.
- Think about diagonals; they're easy to overlook.
- Watch what your move sets up for the opponent above it.
- Control the middle to keep more options open.
- Count threats before you commit a disc.
- Don't stack a column that hands the opponent a win on top.
Common mistakes to avoid
Ignoring the center
Fix: The middle column is the strongest — contest it early.
Missing a block
Fix: Stop any three-in-a-row immediately, even if it delays your own plan.
Setting up the opponent
Fix: Check whether your move lets them win on the square directly above.
Overlooking diagonals
Fix: Scan diagonal lines too, not just rows and columns.
How it works
- 1
Pick a mode
Versus computer or 2 players.
- 2
Drop a disc
Choose a column to play.
- 3
Line up four
In a row, column or diagonal.
Frequently asked questions
Be the first to get four of your discs in a row — horizontally, vertically or diagonally — by dropping them into the columns.
Yes. Switch to 2-player mode to take turns on the same device, or play the computer opponent.
Be the first to get four of your discs in a row — horizontally, vertically or diagonally — by dropping them into the columns.
Yes. Switch to 2-player mode to take turns on the same device, or play the computer opponent.
It plans several moves ahead and punishes mistakes, so it's a real challenge — but it can be beaten with good strategy.
You (red) move first against the computer, which is a slight advantage — use it.
Playing the center column, because it's part of the most possible winning lines.
Yes, free with no sign-up.
Conclusion
Connect Four is a quick game with surprising depth — try to outplan the computer, then challenge a friend. For more, play Tic-Tac-Toe or take on Minesweeper.