Web application
Walk your home before you build it.
Duimstok has a real ground floor, drawn to the millimetre, that you walk through in a browser tab. Open a door, drag a sofa, stretch a tape across the room—then draw your own plan and do it there instead.
Why it's different
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True to the millimetre
The plan is transcribed from a real drawing, and the builder audits the geometry it produces against a declared floor area—drift past one percent is reported, not swallowed. A doorway's clear width is what it's drawn as, minus your body. The walker and the tape agree.
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Nothing to install
It runs in the browser you already have. There are no model files and no image textures to fetch: every wall, chair, and lampshade is built in code at the moment you load it.
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Nothing following you
Rooms are saved to your own browser's storage and photos never leave the tab. No account, no server, no upload—the studio's promise, honoured literally.
Walk the space
- First-person walking with mouse look and a run key, at an eye height of 1.65 m, so every sightline is one a real person would have.
- Doors you actually open, with a glance and a keypress, from within two metres.
- Collision that respects real clearances. You fit where you would fit, and stop where you would stop.
Furnish it
- A twenty-piece catalogue: seating, tables, storage, beds, lighting, appliances, rugs, wall art, and window dressing.
- A ghost preview that snaps to a five-centimetre grid and turns red the moment the piece won't go—into a wall, into another piece, or into you.
- Pieces that know what they are. Wall art snaps flush and faces the right way, pendants hang from ceilings, rugs are walked over rather than around.
- Pick up, move, rotate in fifteen-degree steps, delete.
- Resize anything. Width, depth, and height in centimetres, set against a three-quarter view of the piece, anywhere from half size to double.
- Lamps that light the room for real.
Measure it
- A measuring tape that reads in centimetres and snaps to real geometry.
- Axis lock when a run is nearly square, and a hard stop at the first wall the line crosses.
- Set one end, walk across the room, set the other. The measurement stays on screen while you keep working.
Bring your own home
- Draw a layout from above: drag a rectangle and get walls, drag a wall and the room grows with it.
- Drop in doors and windows at sensible real-world defaults, then set height and sill against a true-scale side elevation you can drag.
- Or paste in a plan generated by an AI—the app hands you the prompt to use.
- A plan that doesn't hold up is refused with every problem listed at once, rather than one discovered at a time.
Daylight that knows which way you face
- Sunlight comes through the actual windows. The sun's bearing is derived from where the openings face, and each one masks its own beam.
- It works on any plan you draw, because no compass direction is written into the code.
Keep it
- Continuous autosave. There is no Save button, and the room is still there when you reload.
- Saved per layout, so several homes never bleed into one another.
- Export and import as JSON, so a room can be backed up or handed on.
Show it off
- P photographs the room. V records a walkthrough clip. Neither has the interface in shot.
- Both download straight from the panel.
Before you rely on it
What Duimstok is not
Duimstok needs a desktop browser with a mouse and keyboard. It uses pointer lock and WASD movement, so a phone or tablet cannot drive it. We would rather say that here than let you discover it on a train.
Every measurement it shows is an estimate. Duimstok is not a surveying, architectural, or engineering service, and it should never be the sole basis for buying, building, fitting, or renovating anything. Check the physical space with real measuring equipment first. The full measurement guidance explains where your responsibility begins.
Built slowly, and it shows its working
Thirty-one architecture decision records sit in the open beside the code. Several were written because the obvious approach was tried first and turned out to be wrong—the daylight model and the collision clearances both took more than one attempt.
"Built slowly" is easy for a studio to claim. This is the part you can go and read for yourself.
Open the front door.
No account, no download, no upload. A furnished ground floor is waiting one click away.