Free 3MF Viewer Online

How to view a 3MF file

Drop the 3MF file on the viewer above, or choose it from your device. The model opens in a moment and fills the frame.

Drag to orbit around your 3MF model, and scroll or pinch to zoom. The Corner, Front, Side, and Top buttons jump to a standard view.

Shaded shows the colors stored in the file, so a multicolor model keeps its colors. The viewer stands 3MF models on the Z axis, like CAD tools and slicers. If a part lies on its side, press Turn upright.

Reading a 3MF

A 3MF states its own unit, such as millimeters or inches. The viewer does not convert it. It shows the size in the file's own numbers with that unit beside them, so a part that reads 80 mm is 80 mm wide.

Print settings, supports, and slicer notes inside the file are not shown. The viewer reads shapes and colors only.

A build plate can hold parts that sit apart, touch, or overlap. Turn the model to spot parts that float or collide, which a slicer may treat differently from what you expect.

To share the model with someone who has no slicer, use the 3MF to GLB converter. To print on a machine whose software reads only STL, use the 3MF to STL converter.

What the numbers mean

The triangle count shows how detailed the surface is. More triangles mean more work for the device that draws the model, so a model that turns slowly may need a lighter export.

The size is the width, height, and depth of the box around the model. The size is shown in the unit the 3MF states, which is usually millimeters.

Fixing common problems

Print settings stored in the file are ignored. Only the model's shapes and colors are read.

If the file holds a whole build plate, every part on it is read and converted.

Files over 150 MB are not opened. Export just the part you need.

If you see a message about 3D, your browser may have WebGL turned off. Try another browser, or turn on hardware acceleration in the browser settings.

Your file stays on your device

The viewer reads your 3MF file in the browser. Nothing is uploaded, and the page does not load anything the file points to. The page counts a visit like any other page, but it never sees the file's name or contents.

From a viewer to a finished render

A viewer shows you the model. A render shows you how it could look built. The Inkfinish studio opens 3MF files too, lets you pick the angle, and turns that view into a finished image from a short description of materials and light.