3D room planner · print-ready output
Design a room in 3D. Print the model on your desk.
Roomforge is a building and floor planner that takes the model seriously: walls with real thickness, doors cut through them, storeys that stack, furniture built from solid geometry, and an STL export that has already been checked against your printer.
No account needed to try it: 1 room, 5 items, 10 catalogue pieces, and single-item STL downloads.
Lay out the rooms
Set the walls, drop in doors and windows, then drag furniture around on a real-world metric grid. Stack floors into a building.
Check it will print
Pick a model scale and Roomforge tells you the printed size, whether it fits your bed, roughly how much filament it needs, and which parts are too thin to survive.
Download the STL
Export the whole building as one solid, or every part as its own file to print in different colours.
Built for the printer, not just the screen
Most planners export a pretty mesh that a slicer chokes on. Roomforge builds every piece from closed, outward-facing solids and runs a printability pass before you download.
- Scale-aware. 1:20 to 1:200. Everything is reported in millimetres at your chosen scale.
- Auto-thickening. A chair leg at 1:100 is 0.4 mm across, thinner than a nozzle. Roomforge grows features below your minimum so they actually appear.
- Bed check. Too big for your printer? You get a suggested scale, one click away.
- Split parts. Export walls, floor and each piece of furniture as separate STLs for multi-colour prints.
- Floors that stack. Each storey exports flat on the bed, and the slab above lands exactly on the walls below.
Catalogue
37 parametric pieces: resize any of them and the geometry rebuilds, so a 1.4 m desk and a 2.4 m desk are both correct rather than stretched.
Amber pieces are Pro. Everything else is free, forever.
Try it on a real room
Open the planner, set your room size, and export a chair to check the quality on your own printer before paying anything.
Open the planner