Convert Cadwork and TeoWin files (3D) online for free
The converter easily converts your 3D CAD files to various formats - free and online. No Cadwork or or other Cad software needed.
To convert other file formats to the "Proprietary 3D Model File" file type, you need software like Cadwork or a similar tool.
The .3d file extension is primarily associated with Cadwork, a specialized BIM (Building Information Modeling) software used extensively for timber construction. Because "3D" is a generic term, this extension is heavily fragmented. It is also used by TeoWin for interior design scenes, Survex for cave survey models, and legacy Advent 3B2 publishing documents. Under the hood, modern Cadwork .3d files are often structured as ZIP archives containing proprietary project data, whereas older variants might use raw text or UTF-16 encoding.
The biggest disadvantage of .3d files is their severe fragmentation and vendor lock-in. You cannot natively open a Cadwork .3D file in standard 3D viewers or web browsers. Sharing these files with clients or external contractors who do not own an expensive Cadwork or TeoWin license is a major issue. Trying to force open a generic .3d file in tools like Autodesk 3ds Max often results in an error because the internal formatting varies wildly based on the originating software.
To make these files usable outside their native ecosystems, you must convert them. For CAD collaboration and engineering, convert the geometry to DXF or STEP. For 3D printing, use STL. If you need to render the model on the web or import it into standard software like Blender, OBJ or GLTF are the best choices. If you are dealing with a rare Advent 3B2 typesetting document, convert to PDF for archiving. Drag and drop your file to analyze and convert it - free, online, and without installing software.
Use Convert.Guru to open and convert your 3D file.
Users also converted OBJ, STL, GLB, PNG, 3MA, JPG, FBX, ZIP, PDF, STP, PRISMA, 3MF and DWG files.
If you want to convert 3D file to 2D, DAE, MAX, BLEND, MA, MB or C4D, you can use Cadwork or similar software from the "Timber Construction CAD Project" category. In the File menu, look for Save As… or Export….
To convert DWG, DAE, X3D, IGES, WRL, JT, SKP, 3DS, 3DM, OBJ, STEP or FBX files to 3D, try Cadwork or another comparable tool in the "Timber Construction CAD Project" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our 3D converter.