The destination will now accept all visitors, including those from non-visa waiver countries and students. Prime minister Jacinda Ardern described the move as an "enormous moment”.
"This is great news to the tourism industry and economy as we approach spring and summer with people from the northern hemisphere booking their winter holidays," the country’s government said.
"We have heard optimistic messages from tourism operators who are ready to welcome back international visitors from all over the world."
The country has also reopened to cruise ships, but passengers will be asked for proof of vaccination.
