This plugin parses QGIS 3 projects and writes a JSON config file with information representing the layer tree. The created file than automatically can be uploaded to a webserver using a SFTP connection.
The plugin is published on the official QGIS Plugins Repository, documentation can be found at Github.
Usually the JSON config file then is used by a web viewer to show a layer switcher. An example usage can be seen by this implementation.
Client: PSIG, Geoparc Orígens