A quick search for "NVivo 12 license key free" leads to forums, torrent sites, and shady blogs offering text files or keygens. These typically fall into three categories:
Most universities that teach qualitative methods have site licenses for NVivo. Check: nvivo 12 license key free
Ask your department's IT admin or librarian. Many students overlook that they legally have access through tuition fees. A quick search for "NVivo 12 license key
NVivo 12 requires a license to activate and use. There are different types of licenses available: Ask your department's IT admin or librarian