Unity Installer
Install Unity plugin
The Unity plugin is distributed as a single editor script. It requires the GLTFast package for GLB model import. Download the script, place it in Assets/Editor/, let Unity compile it, then open Window → Free3D Online.
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No separate installer is required. The plugin updates itself later by checking the published update feed and replacing the same script file in place.
Open Window → Package Manager, click + → Add package by name, enter com.unity.cloud.gltfast and click Add. This is Unity's official glTF/GLB importer.
Download free3d_online.cs from the button above and place it into Assets/Editor/ inside your Unity project. Wait for compilation.
Open Window → Free3D Online, sign in through the browser approval flow, and start importing models into the current scene.