Fill the Dot

Fill the Dot Online – One Line Puzzle

Fill the Dot gives you a simple grid and a single instruction: fill every square with one continuous line. It starts with small 4x4 grids that make you feel like a genius, then scales up to massive, complex shapes that will have you staring at the screen for twenty minutes.

You can't cross your own line, and you can't backtrack (unless you undo). It is a classic Eulerian path problem disguised as a fun casual game. The satisfaction of seeing the last square light up as you complete the snaking path is immense.

Logic Flow

The game is incredibly relaxing. There is no timer, no pressure, just you and the logic. The minimalist design and soothing sound effects create a zen-like atmosphere, making it perfect for winding down.

With hundreds of levels, the difficulty curve is perfect—constantly challenging you without becoming frustratingly impossible.

Why Play Fill the Dot?

It is mental yoga. It stretches your brain's spatial reasoning capabilities. It is the kind of game that makes you feel smarter after playing it.

Perfect Path

The grid is waiting. The line is ready. Can you solve it in one go? Click Play now and find the path!