2D → 3D Building Generator

Build a floor plan,
walk through it in 3D

Type your rooms and dimensions — or describe your building in a sentence — and Allspace generates an exact, walkable 3D model, with multiple floors, stairs, doors and windows. Already have a clean CAD plan? Import that too.

Free & Open Source No account required GLB · OBJ · Unity · Blender
Describe it (optional)

Lists the rooms and arranges them for you — then drag them around below to fine-tune. Understands room names and counts (sizes default to typical, adjust by dragging).

Layout — drag a room to move · drag its corner to resize

Rooms
NameWidthLengthXY
Doors & Windows
RoomSideTypeWidth
Processing
Uploading floor plan...
3D Preview Drag to rotate · Scroll to zoom
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01
Describe or draw
Type rooms and sizes, describe your building in a sentence, or import a clean CAD plan
02
Arrange
Drag rooms to lay out each floor, stack storeys, and place stairs — all to real-world scale
03
Generate & walk
Get a structured 3D model with walls, doors and windows — and walk through it first-person
04
Export
Download as GLB or OBJ — ready for Unity, Unreal, or Blender