  We present Quantum Unfolding, a Fortran90 program for unfolding
first-principles electronic energy bands. It unfolds energy bands accurately by
handling the Fourier components of Bloch wavefunctions, which are reconstructed
from Wannier functions from Wannier90. Due to the wide application of Wannier90
package and the possibility of focusing only on the most important energy
bands, the present code works very conveniently.
