Once you have the software installed and the file downloaded: Usually in your "Downloads" folder.
The official utility for RAR files. You can download the installer for your version (64-bit or 32-bit) from the Official WinRAR Site .
Sometimes simple strings like 1234 or the name of the website are used.
Windows and macOS do not natively support the RAR format. You will need a third-party tool to open and extract its contents.
If the archive is unusually small (e.g., a few KBs for a video) or an executable (.exe) instead of a .rar, do not open it.