How to convert csv files encoding to utf-8

I was able to convert simply using text editor. I opened csv file with iso-8859-13 encoding. Then created empty csv file with utf-8. Then simply copied everything from one csv to another. Then I could import it into new system.

Previously I tried to do this with libreoffice, but for some reason it would save with iso-8859-13 encoding.

Open the file in Notepad++ and click Encoding->Convert to UTF-8.

(Do not click Encode in UTF-8 because it won't actually convert the characters.)

For those who don't know how to convert the file's encoding using Notepad++ : Create a new file in Notepad++ -> Go to Encoding -> Encode in UTF-8 -> Copy-paste the contents -> save the file as .csv