How to open an OBJ file online
- Drop the .obj file into the box above or click Choose file (select the .mtl and texture files together with it).
- Drag to rotate, scroll or pinch to zoom, right-drag or two-finger drag to pan.
- Use the buttons for front / top / side views, wireframe and screenshots.
- Pick an output format on the right to convert and download.
What the viewer shows
- Dimensions of the bounding box (X × Y × Z).
- Triangle count and number of parts.
- Surface area and volume (for closed meshes).
- Watertight check – whether the mesh is closed, which matters for 3D printing.
About OBJ files
OBJ (Wavefront OBJ) was introduced by Wavefront Technologies for its Advanced Visualizer software. It is a plain-text mesh format that stores vertices, faces, normals and texture coordinates, with materials in a separate MTL file. It is widely used to move models between 3D modelling programs such as Blender, Maya, 3ds Max and ZBrush.
Desktop programs that open OBJ
- Blender
- Maya and 3ds Max
- ZBrush
- MeshLab
- Windows 3D Viewer
Frequently asked questions
Is the viewer free?
Yes – viewing is free and unlimited, without an account. Converting and downloading is free for up to 3 files a day; Pro removes the limit.
Is my file uploaded?
No. The file is read by your browser and rendered with WebGL on your device. It is never sent to a server.
Does it work on iPhone and Android?
Yes. Open the page in Safari or Chrome, tap Choose file and pick the model from Files or Downloads.