If you need to modify the STL model, you can do so using its several designing tools. Furthermore, it lets you convert STL to other 3D files like GLB, FBX, 3MF.

3-matic STL is a workhorse with what seems to be a nonthreatening interface and unlimited potential. In a nutshell, 3-matic STL enables you to make major or minor changes directly on STL files, ...