Trex Deck Designer
Free, brand-lockedFree 3D deck planner locked to the Trex composite catalog
Free tier & pricing
Completely free with no payment and no export paywall, but every board, railing and SKU it prices is a Trex composite product, so the shopping list only works if you actually buy Trex.
Last verified Jun 23, 2026. Report a change →
The short answer
Trex's free browser-based 3D tool lets you size a square or rectangle deck, choose Trex composite boards, railings and lighting, then download a shopping list and a printable rendering you can share with a contractor or planning office. It only models Trex products, runs on desktop only, and the material counts are estimates you should verify.
The facts
- Pricing
- Free · Free, brand-locked
- Free tier
- Yes
- Runs in browser
- Yes
- Platforms
- Web
- 2D / 3D
- Good 3D
- Learning curve
- Easy
- Export formats
- PDF, PNG
The catch
- Designs only with this brand’s own catalog.
- Desktop install only — no browser version.
- You must create an account to save or export.
Pros & cons
Pros
- Genuinely free, no credit card, unlimited designs
- Exact Trex SKUs, quantities and a cost estimate in the shopping list
- Generates a printable blueprint usable for permit and contractor conversations
- Lets you set joist/beam lumber size under Substructure Options
Cons
- Locked entirely to the Trex product catalog
- Only square and rectangle deck shapes (plus multi-level)
- Desktop/laptop only, not built for phones
- Material list is a self-serve estimate, not a verified takeoff; order extra
Best for
Homeowners committed to Trex composite who want a contractor-ready shopping list.
Not for
Anyone using wood or a non-Trex brand, or needing curved/freeform deck shapes.
Alternatives to Trex Deck Designer
TimberTech / AZEK Deck Designer
Free, brand-lockedFree to design, save, compare and download a materials take-off, but the take-off only covers AZEK/TimberTech parts and starting a project signs you up for dealer and contractor outreach.
Decks.com Deck Designer
Free, with limitsFree to design and download plans plus a suggested material list after a free signup, but you cannot change the framing lumber sizes and the materials are a suggested list, not a guaranteed takeoff.
Fiberon Discovery Deck Designer
Free, brand-lockedFree with unlimited designs and a downloadable bill of materials, but the BoM is explicitly an estimate and every component is a Fiberon product.
See all Trex Deck Designer alternatives compared →
Head-to-head comparisons
Trex Deck Designer: questions, answered
Is Trex Deck Designer free?
Trex Deck Designer is free, but it only designs with one brand's own catalogue. Completely free with no payment and no export paywall, but every board, railing and SKU it prices is a Trex composite product, so the shopping list only works if you actually buy Trex.
What platforms does Trex Deck Designer run on?
Trex Deck Designer is available on Web. It runs in any web browser with nothing to install.
What file formats can you export from Trex Deck Designer?
Trex Deck Designer exports to PDF, PNG. It does not export CAD (DWG/DXF) formats, so it is not aimed at construction documents.
Does Trex Deck Designer do 3D and photorealistic renders?
Trex Deck Designer supports 3D with good 3d render quality. For fully photorealistic output you may want a heavier tool.
Is Trex Deck Designer easy to learn?
Easy to pick up. Homeowners committed to Trex composite who want a contractor-ready shopping list.
What are the best alternatives to Trex Deck Designer?
Popular Trex Deck Designer alternatives include TimberTech / AZEK Deck Designer, Decks.com Deck Designer and Fiberon Discovery Deck Designer. Compare their free tiers, platforms and export formats on the Trex Deck Designer alternatives page.