How do I draw a latitude and longitude via Google Maps?

There is a website named mapfrappe.com This feature offered the ability to draw latitudes and longitudes via Google Maps (you tap on a point on maps, longitude and latitude are drawn automatically). This feature helps a lot, as I sometimes have to know which places fall in the same latitude or longitude.

The services of the website are not available and may not continue. How do I draw latitudes and longitudes via Google Maps or another map?