Free 3D Deck Designer
Design the deck in 3D — length, width, height, railing, stairs, material — and unlike the brand design tools, this one shows the materials count and the estimated cost while you work. Free, in your browser, nothing uploaded.
No sign-up · WebGL runs on your device · FreeLoading 3D…
Why design and pricing belong together
A picture without a price is a quote waiting to hurt. Standalone deck designers — usually run by a decking brand — happily let you draw a two-level, 600 sq ft masterpiece, then hand you to a dealer. The two decisions that most change the budget, deck height and railing length, are exactly the ones a flat picture hides. Here, raising the deck from 3 ft to 8 ft updates the stairs, posts and the cost estimate in the same motion.
Use it to brief a builder. Settle the size and shape here, download a PNG from a good angle, and attach it to your quote requests. Contractors quote faster and more consistently when the picture, the dimensions and the material are already decided — and you can compare their numbers against the estimate panel. For the itemized breakdown behind the range, run the same dimensions through the deck cost calculator; for the buy list, the deck board calculator.
Frequently asked questions
Is this 3D deck designer really free?
Yes — completely. No sign-up, no trial, no watermark on screenshots. The big deck brands offer design tools to steer you to their products and dealers; this one is independent, shows every material, and tells you the estimated cost while you design.
Does the designer calculate the cost and materials too?
Yes. The panel next to the 3D view shows the estimated cost range, the deck board count and the joist count, calculated with the exact same pricing model as the deck cost calculator on this site. Change the size, height, material, railing or stairs and the numbers move with the model.
Can I save or download my deck design?
Use the Download PNG button to save a screenshot of your design from any angle — drag to the view you like first. Full project saving is not offered; the sliders are the design, so jot down the four numbers (length, width, height, material) to recreate it instantly.
Can I build directly from this design?
Treat the 3D model as a planning and communication tool, not construction documents. It does not check local building codes, frost depth, load tables or ledger attachment details. Show the screenshot to your builder or permit office to explain what you want, then have the structure verified before building.