The LightWave exporter lets you publish 3D files straight from LightWave to Sketchfab.
If your scene contains SubPatches, you will get a warning asking you to freeze your meshes before uploading. Similarly, if your scene contains nGons, you will get a warning asking you to triangulate your model before uploading. You can upload it anyway, but you might get undesired results. When the upload is complete, you can view your model on Sketchfab, adjust rendering settings, and save the default view.
For more detailed instructions and other information, including specifics on SubPatches, texture mapping, nGon triangulation, and troubleshooting, visit the blog or watch the video above.