AGS Restarter is small "app" written in JavaScript that can perform bulk stop, start and restart operations to services on your ArcGIS Server.
As its JavaScript all code is executed in the browser and nothing goes over the network apart from the REST requests to your server.
To deploy simply copy the files to a web server on the same domain as your ArcGIS Server and open the index.html file
NOTE: the "same domain" is important otherwise you will receive CORS errors.
Services can be stopped, started or restarted using the individual buttons.
There are also buttons at the top of the services list to allow bulk actions (i.e to stop/start/restart all services within a folder).
All actions are asynchronous but are called one at a time to not overload the server.