To access the Web Player, you need to copy the entire blend4web/deploy/apps/webplayer directory with the Web Player files from your Blend4Web SDK and make them available on your website.
JSON files can be exported in the same way as the HTML files File > Export > Blend4Web (.json). Upload your exported .json file to your website and specify the path with the load attribute. Both absolute and relative URLs are supported.
For more information about the features of the Web Player, see the corresponding section of the User Guide.
Note: If you try to launch this application locally, it will not run due to the Same-Origin Policy. You should use the Project Manager to load and view exported .json files. You can also use the Project Manager to create production-ready applications based on the Web Player without having to copy files manually.
This method may look a litte more complicated, but it has several advantages. Exported scenes are: