Explainer
What is a3D room planner?
A 3D room planner lets you lay out and furnish a room on screen, in three dimensions, so you can see exactly how it will look and fit before you spend a cent.
The short answer
A 3D room planner takes a flat floor plan and turns it into a room you can see in three dimensions. You set your real measurements, drop in furniture, and look at the result from any angle, the same way you would walk around the real space.
Behind the scenes it uses 3D rendering to draw the room. The point is simple: you get to see the design before it is real, so you do not have to imagine it or risk it.
Why it matters
You stop guessing
A tape measure tells you a sofa is 84 inches wide. It does not tell you whether it will crowd the walkway, fight with the window, or make the rug look tiny. So people buy, hope, and end up returning the thing that did not fit.
A 3D room planner answers the question before you buy. You see the sofa in the room, to scale, next to everything else. Fewer returns, fewer regrets, and a layout you trust.
What a good one does
Build the room to scale
Set your real dimensions so every piece takes up the space it actually would.
Drag in furniture
Place sofas, tables, and beds, then move them around until the layout works.
See it from any angle
Walk around the room on screen and check the fit, the flow, and the feel.
Shop what you place
The best planners use real furniture you can buy, not just generic models.
How Cona does it
Free, in your browser
Cona is a free 3D room planner. You recreate your room to scale, design it with real furniture you can actually buy, and see the whole thing in 3D as you go. No download, no experience needed.
FAQ
Frequently asked questions
What is a 3D room planner?+
A 3D room planner is a tool for laying out and furnishing a room in three dimensions. You build your space to scale, drag in furniture, and view it from any angle, so you can see how a design looks and fits before you buy or move anything.
Is a 3D room planner free?+
Some are, some are not. Cona is free to use in your browser, with no project cap and no credits. Other planners are free to start but charge for renders, extra projects, or the full catalog.
Do I need to install software?+
Not with a browser-based planner. Cona runs in any modern browser on desktop and mobile, with nothing to download.
Do I need design experience?+
No. A good 3D room planner is built for beginners. In Cona you start from an empty room, drag furniture around, and watch it come together in minutes.
Can I use real furniture I can actually buy?+
In Cona, yes. The catalog is real pieces from brands like IKEA, CB2 and Herman Miller. You place them in your room in 3D, check the fit, and buy the ones you love.
What is the difference between a floor plan and a 3D room planner?+
A floor plan is the top-down view of your space, showing walls and dimensions. A 3D room planner turns that flat plan into a room you can walk through on screen and furnish, so you see height, depth, and how it really feels.
by Nikita Losenco · Founder & CEO, Cona
Last updated June 2026
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