WorldEditSelectionVisualizer (WESV) is essentially the famous WorldEditCUI mod in the form of a bukkit plugin, which means that players don't need to install anything on their client.

• Spawns particles around WorldEdit selections so players can see them
• No client mod required
• Supports cuboid, sphere, ellipsoid, cylinder, polygon and convex selections
• Can display the current clipboard
• Use /wesv toggle to toggle the visualizer
• Option to only show the selection when holding the selection item
• Configurable particle effect and view distance
• Prevent players from spawning too many particles when selecting huge regions
• Highly customizable for the performance of your server
• Great compatibility: works with 1.7.10 to 1.14 servers, with WorldEdit 6 and 7, and with or without FastAsyncWorldEdit

You can download releases and find more information on SpigotMC.

Cuboid selection	Cylinder selection	Convex selection

WorldEditSelectionVisualizer was originally made by Rojetto, and then was updated and maintained by martinambrus.