CAD & 3D Model Importing

Easily import CAD or 3D models in dozens of formats, including STEP, IGS, FBX, OBJ/MTL, and PLY.

Our powerful REST API helps automate the import process and ensure your models are optimized for the web.


Support for over 30 files formats

STEP, IGS, FBX, OBJ/MTL, PLY, and dozens more

Optimized file importing

Import the most complex 3D files and easily convert to a lightweight, high-quality 3D model optimized for the web

Built-in 3D Editor

Prepare and manage your 3D files in one location using – our web-based editor


Use our powerful REST API to streamline and automate your import process

Proprietary in-browser format

Our proprietary 3D format ensures fast-loading and maximum fidelity in the browser, and protects your IP

Available for consulting

Use our API right out of the box, or let us help build a solution for you — get started here


One of the biggest challenges in bringing 3D to a website is to successfully convert complex 3D files into a usable and lightweight, web-friendly 3D model. With ThreeKit, you can import your 3D models from your preferred CAD or 3D modeling software using our wide library of supported file formats. Our import process also allows you to optimize your files for display performance in any web browser.

Don’t have a 3D model of your products?  We can work from your existing CAD files or create a custom model from scratch, either way, we’ve got you covered.

Supported File Formats

CAD Formats & Tools (STEP/STP, IGES, STL, DGN, DWF, DWG, DXF, IFC, SAT, and SKP)

  • Autodesk (including: AutoCAD, Inventor, and Revit)
  • Creo Parametric
  • FreeCAD
  • OnShape
  • SolidWorks

*Many native CAD formats are not supported, export as STEP instead.

3D Modeling Formats & Tools (FBX, OBJ/MTL, DAE, 3DS)

  • 3ds Max
  • Blender
  • Maya
  • Mudbox
  • ZBrush

*FBX or OBJ preferred.

Customer Success Story

Onshape required a simple, web-based solution to help display CAD projects online. The ability to quickly drag-and-drop materials and visualize those changes in real-time was essential to providing a rich user experience.

  • Real-time CAD Visualization
  • Created the Visualizer 3D rendering tool
  • #1 Most-Popular app in the Onshape App store