SolidWorks

Uploading models from SolidWorks can be tricky, so we have a few possible workflows:

SolidWorks Exporter

The Solidworks to Sketchfab Publisher by nCricle Tech uses VRML format, and should preserve geometry and basic material colors.

Find File → Publish to Sketchfab. If it's not there, check that the Sketchfab Publisher for SolidWorks is loaded correctly in the Add-Ins Manager.
Once your model is loaded, click Publish to Sketchfab, and a dialog box should appear.
Enter your API token, title, tags, description, and mark it as Private if necessary.
Click Publish!
The progress bar will indicate when the upload is complete, and the model should open in your browser.

CAD software does not often export textures accurately because they don’t use UV coordinates.

Sketchfab user UnF0u has written a workflow tutorial for exporting SolidWorks models for Sketchfab using the free plugin KeyShot Bridge.

Some users have had success using the Free SolidWorks OBJ Exporter plugin.