Disclosed herein are cellulase variants, or active fragments thereof, and polynucleotides encoding same, where the cellulase variants, or active fragments thereof, have endoglucanase activity. Also disclosed herein are compositions comprising the cellulase variants, or active fragments thereof; vectors and/or host cells comprising the polynucleotides encoding the cellulase variants, or active fragments thereof; and methods for making and/or using the cellulase variants, or active fragments thereof and/or compositions containing same; where the cellulase variants, or active fragments thereof, have endoglucanase activity.