Viewer · OBJ
OBJ viewer: open a .obj file in your browser
The OBJ format is everywhere: scans, asset libraries, exports from sculpting software. Drop the .obj to see its shape, count its triangles, switch to wireframe and save an image. The file is read on your device; .mtl materials are not loaded.
Nothing is uploaded: everything runs in your browser.
Geometry only: what that means
An OBJ describes vertices, faces and sometimes groups; its colors live in a separate .mtl file and texture images. The viewer reads the .obj only: the model appears in neutral grey, with its exact shape. To see a textured model, export it as GLB from your software and open it in the GLB viewer.
Quads and polygons
Quads and polygons in the OBJ are split into triangles when the file is read. The number shown is therefore the triangle count, not the face count of the file. A 3D-scan OBJ with several million faces exceeds the tool's limit, which is set so a phone's memory is not overloaded.
Towards printing
To print an OBJ, convert it to a binary STL with the converter, then measure its dimensions in the checker: an OBJ stores no unit, and a model in meters comes out a thousand times too small in a slicer.
How it works
Drop the .obj
Up to 80 MB on a computer, 40 MB on a phone; 3 million triangles at most.
Inspect
Rotate, zoom, front and side views, wireframe.
Capture or convert
PNG image of the view, or conversion to STL for the slicer.
Frequently asked questions
- Why is my OBJ grey?
- Because the viewer does not read the .mtl or the textures. Only the geometry is shown. A GLB export keeps the colors.
- Is the file uploaded?
- No. Your browser reads it and it never leaves.
- Can I open an OBJ with several million faces?
- Up to 3 million triangles on a computer and 1 million on a phone. Beyond that, decimate the mesh in your software before opening it.
- How do I print it?
- Convert it to STL, then check the unit and dimensions before slicing.
Create a 3D model with AI
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