The Free Parts Library: Free 3D Models and CAD Drawings You Can Open in the Browser

The Free Parts Library is a collection of 3D models and CAD drawings that anyone can preview in the browser, download and reuse. It holds 5,808 parts today: 4,217 3D models and 1,591 drawings and other 2D files. The library is growing quickly, with hundreds of models added every day.

• The 3D Parts Library has furniture, lighting, mechanical parts, vehicles, people, plants, antiques, spacecraft and CAD solids in GLB, STEP and many other formats.
• The Drawing Library has standard construction details and engineering drawings in DWG and PDF.

There is no account to create and nothing to install. Every part opens in the 3D Viewer, and each part page shows the license and the source.

Ten parts, ray traced

Thumbnails of the 3D parts are rendered with the viewer’s ray-traced style. Light bounces between the part and its surroundings, so contact shadows, reflections and soft light fall where they would in a photograph. Each part gets a ground and a light rig that suit it: water for pale models and ships, sand and stone for dark ones, gravel for outdoor props, a warm backdrop for hanging lights and a dark void for spacecraft. The grounds, the lighting and the camera angle are saved with the part, so opening it in the viewer starts from the same view.

Ten examples from the library, each linked to its part page:

Categories

Parts are grouped by what they are. The categories below are the sections of the library, and the full list at the end of this article follows the same order.

• Furniture & interiors (934). Chairs, sofas, tables, beds, kitchen and bathroom fixtures, appliances, rugs and household props.
• Architecture & BIM (774). Buildings, rooms, doors, windows, stairs and other architectural and BIM content.
• Lighting (294). Luminaires, lamps, pendants, chandeliers, sconces and bulbs.
• People & figures (323). Human figures and characters for scale and scene dressing.
• Electronics & PCB (371). Circuit boards, electronic components and enclosures.
• Mechanical (440). Machined parts, assemblies, gears, brackets and other mechanical solids, many as STEP.
• Fasteners & hardware (178). Screws, bolts, nuts, washers and other hardware.
• Tools & jigs (186). Hand tools, power tools and workshop fixtures.
• Vehicles (198). Cars, aircraft, spacecraft, ships and other vehicles.
• Art & decor (246). Sculpture, vases, artifacts and decorative objects.
• Nature & terrain (262). Plants, rocks and landscape elements.
• Floor plans & site plans (42). Plans of rooms, buildings and sites.
• Construction details (382). Standard construction and site details, mostly DWG.
• Blocks & symbols (440). CAD blocks and symbols for drawings.
• MEP & electrical (138). Mechanical, electrical and plumbing content.
• Other (600). Parts that fit none of the other categories.

Finding and using a part

Each library has a search box that looks at titles, descriptions and keywords, a filter by file format, and filters by category and tag. Search forgives plurals and common synonyms: a search for “couch” finds sofas, “tv stand” finds media consoles and “pirate ship” finds the sailing pinnace. Every part carries extra search terms for the names people use for it.

Clicking a thumbnail opens the file in the 3D Viewer. Models can be rotated, sectioned and measured; drawings can be zoomed, measured and have their layers switched on and off. Each part also has its own page with the full description, tags, license and source, and a download button for the original file. To get a part in another format, open it in the viewer and use Export: a STEP part can come out as STL for printing, a drawing as DXF or PDF.

Licenses

Each part’s page states its license and links to the source. Most parts are in the public domain, under one of these terms:

• CC0 1.0. Kenney, Poly Haven and Smithsonian Open Access models, and every part people contribute. CC0 is a public-domain dedication that works worldwide: use, modify and redistribute the file for any purpose, including commercial work.
• US Government work. The Forest Service, NIST and NASA files. Works of the US federal government are in the public domain in the United States (17 U.S.C. §105); the rules in other countries can differ.

A few parts come with another permissive license, such as MIT or the Unlicense, which the part page names. The Forest Service drawings carry the agency’s own caveat: they were drawn as guidance for Forest Service projects and may not meet current standards. Treat them as a starting detail and check dimensions, codes and site conditions before building from one. The library terms have the full wording.

Adding your own parts

Contributions go through the same two libraries. The viewer decides whether a file is a 3D model or a 2D drawing, so there is one way in for both.

One file at a time: open it in the viewer, click Share, and tick Also add this model to the Free Parts Library. Give the part a name and a description, add a few search keywords, and tick the tags that fit. The contributor agreement confirms that you have the rights to the file and dedicates it to the public domain under CC0; the share button stays disabled until it is accepted.

Many files at once: the contribute page takes up to 50 files, or zip files of them. A zip is split into one part per model or drawing inside it, except when its files belong together (a glTF with its textures and buffers, a shapefile, a Gerber fabrication set), in which case it stays one part. Each file gets a thumbnail and is sorted into the right library, you describe each one, and shared keywords, tags and a credit line can be applied to all of them in one step. The agreement is accepted once for the batch.

Every contribution is reviewed before it appears. Parts are kept for a length of time that depends on file size:

Ordinary share links, outside the library, are kept for 90 days.

Browse the 3D Parts Library and the Drawing Library, or add your own parts.

All parts in the library

Every part in the library as of 2026-10-25, by category: 5,808 parts. Each title links to the part’s page.