Simple ID Revoke is a light plugin that enables wordpress admin to see the Page ID, Post ID, User ID, and etc.

Simple ID Revoke is a light plugin that enables wordpress admin to see the Page ID, Post ID, User ID, and etc. This plugin was originally developed for to show IDs on our own websites. But we found that it can help many other of wordpress users and admins. it is the simplest way to get what you want, Just install and activate the plugin.