Need to fix a broken STL or merge two parts before 3D printing? Microsoft's 3D Builder repairs, splits, simplifies and combines models, and can turn a drawing or webcam photo into a 3D design. Note that Microsoft withdrew it from the Store in July 2024 and no longer updates it.
Open and repair a model
Load a 3D model to inspect it and make basic changes before printing. 3D Builder can repair model geometry, and its editing tools include separating objects, simplifying them, and merging parts. These operations suit tasks such as resizing a design or joining pieces into one object.
The program also includes controls for adjusting how a design appears on screen. Shading, shadows, colors, and reflections can be changed or turned off while examining the model.
Build a design from objects or a picture
Start with a built-in design, add elements to a project, or create a 3D object from a 2D drawing. A webcam photo can also serve as the basis for a 3D design. Once the object is in the workspace, painting and texture tools let you change its surface appearance.
- Start from included designs such as toys, kitchen items, boxes and decorations.
- Use the selection and view controls to inspect and arrange parts in the scene.
Move around the 3D workspace
The mouse controls change the viewing angle and position without requiring a separate navigation panel. Hold the left mouse button and drag to rotate the view; hold the right button and drag to move sideways. Shift with a left-button drag zooms in or out, while Alt enables selecting items on screen.
Pros
- Repairs 3D models and prepares them for printing
- Separates, simplifies, and merges objects
- Creates 3D designs from drawings or webcam photos
- Includes ready-made models and painting tools
Cons
- Discontinued: removed from the Microsoft Store in July 2024
- No updates or support from Microsoft
System requirements: Windows 8.1, Windows 10, Windows 11
Is 3D Builder still available from Microsoft?
No. Microsoft deprecated it and removed it from the Microsoft Store in July 2024. Copies already installed keep working but get no updates.
Can 3D Builder repair a model before printing?
Yes. Its repair function fixes holes and bad geometry, and it can simplify, split or merge objects.
Which files can it open?
Common 3D printing formats such as STL, OBJ and 3MF.
