World Sweeper is a free browser-based puzzle game built around exploring enormous shared maps together. Players claim areas, solve the puzzles within them and earn points, while their completed work remains visible to everyone. Over time, each map is gradually uncovered, creating a cooperative experience with friendly competition. The game runs in desktop and mobile browsers, requires no installation, and can be played anonymously; Google sign-in is available to link scores and play history to an account.

World Sweeper offers eight puzzle modes, including classic MineSweeper, ColorSweeper, Mosaic, Nikakudori, Sudoku, Loop, Packing and ChainSweeper. Players can also use MojiChat, a real-time spatial chat where letters can be placed freely. Public maps are available to browse by name, mode and progress, and friends can join the same map through a shared URL, with progress updating in real time. The site also features a daily puzzle, leaderboards, community links, and opportunities to submit artwork or provide feedback.