Pirated unlockers often have faulty RAR parsers. Instead of recovering your password, they corrupt the archive header, making the file completely unreadable by any tool, including WinRAR.
"I downloaded Rar Password Unlocker from Kuyhaa. It didn't crack my file, but my Chrome saved passwords were stolen. I lost my Instagram account." – Rar Password Unlocker Kuyhaa BEST
If you want the "BEST" without risking your computer, here are the top legitimate tools. They are paid (or trial-restricted), but they are safe. Pirated unlockers often have faulty RAR parsers