City Generator

Seed:

Normal mode: click two same-size buildings to swap. Architect mode: click any occupied cell to replace its content.
Legend
Asset count
Town preset
Generation
Empty space is reserved before buildings are placed, so the requested percentage is approximate when roads and the river intersect it.
Buildings
Manual tools
Left-click or drag to paint. Right-click paints the selected erase background. Multi-cell buildings are placed on click; one-cell tiles support drag painting.
Paint palette
Paint tool ready.

Architect palette

Target cell: . Choosing a multi-cell building clears anything it overlaps.