free of chargeadverb
uk/ˌfriː əv ˈtʃɑːdʒ//ˌfriː əv ˈtʃɑːrdʒ/without having to pay:
You can download the materials free of charge from our website.
The classes are offered free of charge.
free of chargeadjective
/ˌfriː əv ˈtʃɑːdʒ//ˌfriː əv ˈtʃɑːrdʒ/available at no cost:
Admission to the museum is free of charge.