Play the classic Connect Four game online for free. Drop discs to connect four in a row — horizontally, vertically, or diagonally. Two-player mode or play against the AI. Pure client-side, no downloads required.
Connect Four is a classic two-player connection game in which the players take turns dropping colored discs from the top into a vertically suspended grid. The pieces fall straight down, occupying the lowest available space within the column. The objective is to be the first to form a horizontal, vertical, or diagonal line of four of one's own discs. This online version features both local two-player mode and an AI opponent with adjustable difficulty. All gameplay happens in your browser — no data is sent to any server.
The goal is to connect four of your discs in a row — horizontally, vertically, or diagonally. Strategy involves controlling the center columns, creating multiple threats, and blocking your opponent's potential winning moves.
On Easy and Medium difficulty, the AI makes occasional mistakes and can be beaten with good strategy. On Hard difficulty, the AI uses a more advanced algorithm and is much more challenging to defeat.
Yes! Select "2 Players" mode to play locally with a friend on the same device. Players take turns clicking columns to drop their discs.
Key strategies include controlling the center columns (they offer the most winning combinations), building from the bottom up, creating "double threats" (two ways to win on your next turn), and always blocking your opponent's three-in-a-row.