FBX viewer, in the browser

Drop an .fbx. Textures embedded in the file show at once; textures kept in a folder show when you drop the folder with it. A clip in the file, a Mixamo download say, plays on its own skeleton.

Drop a .fbx file here — or the whole folder

textures inside the file open with it; textures beside it need selecting together, or drop the folder. Nothing is uploaded.

How to open an FBX

Drop the .fbx on the page, or drop it together with the folder that holds its textures; images are matched to the materials by file name.
Orbit and zoom. Open the mesh list to hide a part, switch on the wireframe to see the topology, and read the panel for bones, meshes and triangles.
If the file carries a clip, press play. A large file (tens of megabytes) is loaded on request, because the whole thing is parsed in memory.

Textures, and why FBX files arrive grey

An FBX either embeds its images or names them by path on the disk of whoever exported it. The embedded kind opens textured here. The other kind names files that are not in the upload, so the viewer asks for the folder: drop the .fbx and the folder together and the images bind by the names the materials carry.

Binary and text FBX of version 7.0 and newer are read in the browser. Materials come out close to how Blender shows them; engine-specific shaders are not reproduced.

Questions

Everything is grey.

The file names textures that were not dropped with it. Drop the .fbx together with its texture folder, or the zip the model came in.

Does it play Mixamo clips?

Yes. A Mixamo download is a skeleton with one clip; the clip is listed by name and plays on that skeleton. To play it on another character, convert it to VRMA.

Which FBX versions open?

7.0 and newer, binary or text. Older 6.x files are refused by the reader; re-save them from Blender or the free FBX Converter.

Is the file uploaded?

No. The FBX is parsed and drawn in your browser.

Can this become a VTuber avatar?

A rigged FBX converts to VRM on the FBX to VRM converter, with the bones mapped onto the VRM humanoid. A model without a skeleton has to be rigged first.

The same FBX as a VRM, or as a GLB

A rigged character becomes a VRM on the FBX to VRM converter . For the web or an engine, the FBX to GLB converter packs the textures into one file.

Convert FBX to VRM