Hello! I am kind of new here, so I hope this is the right place to post this. 
Is there any way to make an in-game object editor in Unity?
You should try and elaborate on what you mean. Always be as concise as possible. Por exemple, I have no idea what youāre talking about. 
Welcome to the forums by the way.
thanks, the āin-game object editorā I am talking about is like the in-game object creator in the online game āSecond Lifeā.
Absolutely, you have plenty of flexibility to do that: you can create/modify meshes, save files, and communicate over the network.
d.
how would I go about doing this? (sorry, as you can tell, im new)
EDIT: I think I found a clue on how to do this, but please still give your input. thanks! 
Well it is complicated. A place to start is to create transform handles and add scripts to them that move the object they are attached to.
Try doing the scripting tutorials to get a hang of how things work. Donāt try something too advanced at first.