To protect yourself while searching for any specialized tool:
On the first launch, you will likely be greeted with a setup wizard:
Yes, provided you download the OS-specific installer. The Windows version is the most common, but cross-platform builds exist.
The original tool is usually internal to repair centers or board manufacturers. Leaked versions circulate on Chinese forums, file repositories (Baidu, 4pda), and certain GitHub forks. It is typically shared as freeware, but with zero official support.
Recommendation: If you are downloading from any site other than an official OEM domain, run the file inside a Windows Sandbox or a Virtual Machine (VMware/VirtualBox) first.