When you are doing a big project, there are always some Objects you just done once and duplicated multiple times and never set up as a Prefab.

After a couple weeks, for some reason your boss told you to update that old object. You figure out that you need to do the same thing about 10 or 100 times, because you don't want to break the object dependency and everything is just duplicated there without using any prefab.

This is the tool to save those people who forgot to Prefab.

How to use:

1. Select multiple object
2. Right click > Convert To Prefab > Convert Window
3. Pick your base object
4. Convert!

*In Unity 6.0 version, target object change merge with Root Object is possible.

*Before Unity 6.0 verison, target object change will be overrided by Root Object. (Still keeping object references)