Fijian passport holders do not need a Visa to enter Fiji. All other passport holders will need correct visa or permit to enter Fiji.
Here is the list of nationalities that are visa exempted and issued with a visitors permit on arrival.
Visa Exempted Countries
There are different permit categories depending on your purpose and length of stay. Each permit has conditions about what you can do in Fiji. You will need to apply for the correct permit to:
Make sure you apply for the permit that matches what you want to do in Fiji, and that you are eligible to apply for that permit.
Visitors visa is issued to citizens from non-exempted countries for up to 4 months or period granted for other purposes. Ensure your application is approved prior to your travel.
Visitors Permit is applicable to citizens of visa exempted countries and is issued on arrival. Please refer to list of visa exempted countries here. Visa eligibility and requirements can be found here.
You can apply for Visitors Visa online through the Fiji Immigration Portal
Yes - you're welcome to transit through Fiji but you must have the following documentation:-
A valid outward ticket within 72hrs of arrival, meet the entry requirements (including testing) of your final destination.
You can stay within the airport for up to 10 hours to connect to another flight or check into a hotel if you stay overnight.