In the early 2010s, mastering was often seen as a dark art reserved for high-end studios with expensive outboard gear. iZotope changed that narrative by packing a professional-grade signal chain into a single VST interface. For many bedroom producers, Ozone 5 was their first encounter with "visual mastering," using the and Vectorscope to literally see the balance of their tracks.
Go to iZotope’s website, download the trial via Product Portal. You get full functionality, including all modules, assistant AI, and mastering codec preview. iZotope - Ozone 5 Advanced VST Free Download