Free 3D tool
FBX Viewer Online: Free, With Polycount and Fab Spec Sheet
Drop in an FBX, GLB or OBJ file. Turn it in 3D, see the tri count, size, LODs and UVs, and copy the specs for your Fab or CGTrader listing.
Drop in an FBX, GLB or OBJ file. Turn it in 3D, see the tri count, size, LODs and UVs, and copy the specs for your Fab or CGTrader listing.
The counts come from the file itself, not from a guess. GLB and glTF store triangles only, so quads show as unknown there.
Nothing leaves your device. Your browser reads the file and draws it with WebGL. Close the tab and it is gone.
Made the model with an AI 3D generator? We make ours with Meshy (ad, affiliate link) and export GLB or FBX. Check every AI model here before you list it: AI meshes can come out with broken parts and messy topology, and buyers notice.
| Number | Where it comes from |
|---|---|
| Tris | Every face counted as triangles: a quad is 2, a 5-sided face is 3. This is the number marketplaces and game engines mean by "polycount". |
| Faces as modelled | Tris, quads and n-gons as they are in the FBX or OBJ. GLB has triangles only, so there it is tris. |
| Size in cm | The bounding box of LOD0, in the file's own unit: FBX stores it, glTF is metres. OBJ has no unit, so pick one above. |
| LODs and collision | Read from the mesh names: _LOD0, _LOD1 and so on, and UCX_, UBX_, UCP_, USP_ for collision (the Unreal names). Only LOD0 counts for tris and size. |
| Clean UV | All UVs inside 0 to 1, and 1% or less of the used UV area is covered twice. |
| Textures | The pixel size of each texture, read from the file header. |
We checked these numbers against Blender on our own 10-model mushroom pack. Tris and faces matched exactly, and the size was within 1%.
The Fab fields block uses the field names of the Fab format page, in the order the form shows them: pack of multiple assets, assets, unique meshes, LODs, collision, UV channels, clean UV, overlapping UV, UDIM, vertex colors, animated, rigged and animation tracks. The summary line works as the "technical details" part of a Fab or CGTrader description.
The bounding box field on Fab names no unit, so the tool leaves it to you. Use the size from the summary line.
No. The FBX viewer runs in your web browser, so there is nothing to download or install. Open the page, drop in an FBX, GLB, glTF or OBJ file, and the model shows up in 3D. You also need no signup. The page only needs a modern web browser with WebGL.
Yes. The FBX viewer opens FBX, GLB, glTF and OBJ files. Drop the textures, the .mtl file for an OBJ and the .bin file for a glTF in the same drop. GLB and glTF store triangles only, so quads show as unknown for those files. OBJ stores no unit, so pick one to see the model size.
Yes. The FBX viewer runs in the browser, so it works on a Mac the same way it works on a Windows PC, with nothing to download. It needs a modern browser with WebGL. For very big scenes the limit is your browser's memory, so a desktop browser is the better choice for big files.
No. The FBX viewer does not upload your file. Your browser reads the file and draws it with WebGL on your own device. Nothing leaves your device, and when you close the tab the model is gone. You can check a model pack before you list it on Fab or CGTrader without sending it anywhere.
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