Yes, completely free with no signup or ads.

Does my data leave my device?

No. The simulation runs entirely in your browser — nothing is ever uploaded to a server.

Does it work on mobile?

Yes. Touch and drag to draw cells on iOS Safari and Android Chrome.

ライフゲームをシミュレーション。セルを描いてパターンの進化を観察。

Generation

Live cells

Click or tap cells to toggle them alive (bright) or dead (dark). Drag to paint multiple cells. Or press Random for a seeded starting grid.
Press Play to start the simulation — each generation applies the birth/survival rules simultaneously to every cell.
Press Step to advance one generation at a time. Press Pause to stop, then edit cells and continue.

Is it free?: Yes, completely free with no signup or ads.
Does my data leave my device?: No. The simulation runs entirely in your browser — nothing is ever uploaded to a server.
Does it work on mobile?: Yes. Touch and drag to draw cells on iOS Safari and Android Chrome.

Last updated: 2026-05-20 By jarvisbox