On Sketchfab, a private model is "unlisted", which means it won't appear in searches or public galleries, and it won't be indexed by search engines. However, anyone with the model URL can still view and embed a private model.
If you add a password to your private model, no one can view it without entering the password, even if he or she knows the URL.
To make a model private:
- Upgrade to a monthly or annual Pro (or above) membership
- On your model page, click the Edit Properties button.
- Click the drop-down under "Who can see?" and choose your desired option.
- Type a password (optional)
- Click Save.