is there a cardboard/VR emulator available?

i need to check out the content of some VR apps, but i dont have a set of VR glasses. is there any app or emulator or anything that can just show me the split 2-D views side by side? i dont need the "full experience". a basic rendering will do just fine i scoured the web but couldnt find anything like this thanks! here's a screenshot. i'm using droid4x