How to solidify edges I have a complex mesh with only vertices and edges that I want to solidify.

The problem is I just want to solidify edges (not any faces) to have some kind of fat wireframe model (i.e. just every edges being cylinders). Not a classic solidify.

How can I achieve that?

Here is my mesh:
You could use the Skin Modifier. After adding it to the object, it might appear fat and blobby, so to adjust the thickness you can Tab into Edit mode and use CtrlA to affect the thickness.



Another way is to just fill in the faces of your model and make use of the Wireframe modifier.